diff --git a/morpheus.js b/morpheus.js
index b97fc59..996859b 100644
--- a/morpheus.js
+++ b/morpheus.js
@@ -16,13 +16,6 @@
     , now = perfNow ? function () { return perfNow.call(perf) } : function () { return +new Date() }
     , html = doc.documentElement
     , thousand = 1000
-    , rgbOhex = /^rgb\(|#/
-    , relVal = /^([+\-])=([\d\.]+)/
-    , numUnit = /^(?:[\+\-]=)?\d+(?:\.\d+)?(%|in|cm|mm|em|ex|pt|pc|px)$/
-    , rotate = /rotate\(((?:[+\-]=)?([\-\d\.]+))deg\)/
-    , scale = /scale\(((?:[+\-]=)?([\d\.]+))\)/
-    , skew = /skew\(((?:[+\-]=)?([\-\d\.]+))deg, ?((?:[+\-]=)?([\-\d\.]+))deg\)/
-    , translate = /translate\(((?:[+\-]=)?([\-\d\.]+))px, ?((?:[+\-]=)?([\-\d\.]+))px\)/
       // these elements do not require 'px'
     , unitless = { lineHeight: 1, zoom: 1, zIndex: 1, opacity: 1, transform: 1}
 
@@ -42,6 +35,7 @@
   }()
 
   // initial style is determined by the elements themselves
+  // TODO: redundant camelize, but getStyle is exposed to the outside world, so removing this might break compatibility
   var getStyle = doc.defaultView && doc.defaultView.getComputedStyle ?
     function (el, property) {
       property = property == 'transform' ? transform : property
@@ -121,35 +115,6 @@
     }
   }
 
-  function parseTransform(style, base) {
-    var values = {}, m
-    if (m = style.match(rotate)) values.rotate = by(m[1], base ? base.rotate : null)
-    if (m = style.match(scale)) values.scale = by(m[1], base ? base.scale : null)
-    if (m = style.match(skew)) {values.skewx = by(m[1], base ? base.skewx : null); values.skewy = by(m[3], base ? base.skewy : null)}
-    if (m = style.match(translate)) {values.translatex = by(m[1], base ? base.translatex : null); values.translatey = by(m[3], base ? base.translatey : null)}
-    return values
-  }
-
-  function formatTransform(v) {
-    var s = ''
-    if ('rotate' in v) s += 'rotate(' + v.rotate + 'deg) '
-    if ('scale' in v) s += 'scale(' + v.scale + ') '
-    if ('translatex' in v) s += 'translate(' + v.translatex + 'px,' + v.translatey + 'px) '
-    if ('skewx' in v) s += 'skew(' + v.skewx + 'deg,' + v.skewy + 'deg)'
-    return s
-  }
-
-  function rgb(r, g, b) {
-    return '#' + (1 << 24 | r << 16 | g << 8 | b).toString(16).slice(1)
-  }
-
-  // convert rgb and short hex to long hex
-  function toHex(c) {
-    var m = c.match(/rgba?\((\d+),\s*(\d+),\s*(\d+)/)
-    return (m ? rgb(m[1], m[2], m[3]) : c)
-      .replace(/#(\w)(\w)(\w)$/, '#$1$1$2$2$3$3') // short skirt to long jacket
-  }
-
   // change font-size => fontSize etc.
   function camelize(s) {
     return s.replace(/-(.)/g, function (m, m1) {
@@ -236,43 +201,182 @@
     return [r[0][0], r[0][1]]
   }
 
-  // this gets you the next hex in line according to a 'position'
-  function nextColor(pos, start, finish) {
-    var r = [], i, e, from, to
-    for (i = 0; i < 6; i++) {
-      from = Math.min(15, parseInt(start.charAt(i),  16))
-      to   = Math.min(15, parseInt(finish.charAt(i), 16))
-      e = Math.floor((to - from) * pos + from)
-      e = e > 15 ? 15 : e < 0 ? 0 : e
-      r[i] = e.toString(16)
+
+  // Takes a CSS "used value" and returns a parsed object
+  function parseCSS1(k, s, i) {
+    var x, y, a = [], old = i
+    // It's a number
+    if (/[+\-0-9]/.test(s[i])) {
+      x = { type: 'number' }
+      if (/[+\-]/.test(s[i])) {
+        if (s[i + 1] === '=') {
+          x.relative = s[i]
+          i += 2
+        } else {
+          a.push(s[i])
+          i += 1
+        }
+      }
+      while (s[i] && /[0-9\.]/.test(s[i])) {
+        a.push(s[i])
+        i += 1
+      }
+      x.value = +a.join('')
+
+      // This is for the optional unit
+      a = []
+      while (s[i] && /[a-zA-Z%]/.test(s[i])) {
+        a.push(s[i])
+        i += 1
+      }
+      x.unit = a.join('')
+
+      // TODO: pretty hacky
+      // some css properties don't require a unit (like zIndex, lineHeight, opacity)
+      if (x.unit === '' && !(k in unitless)) {
+        x.unit = 'px'
+      }
+    } else {
+      while (s[i] && /[^\( ]/.test(s[i])) {
+        a.push(s[i])
+        i += 1
+      }
+      // It's a function
+      // TODO: doesn't currently handle stuff like `foo(bar qux, corge)`
+      if (s[i] === '(') {
+        x = { type: 'function', value: a.join(''), args: [] }
+        i += 1
+        while (s[i]) {
+          while (s[i] === ' ') {
+            i += 1
+          }
+          y = parseCSS1('opacity', s, i)
+          x.args.push(y.value)
+          i = y.index
+          if (s[i] === ')') {
+            i += 1
+            break
+          } else if (s[i] === ',') {
+            i += 1
+          }
+        }
+      // It's a normal value
+      } else {
+        x = { type: 'normal', value: a.join('') }
+      }
+    }
+    if (i === old) {
+      throw new Error('invalid CSS value ' + s)
     }
-    return '#' + r.join('')
+    return { value: x, index: i }
   }
 
-  // this retreives the frame value within a sequence
-  function getTweenVal(pos, units, begin, end, k, i, v) {
-    if (k == 'transform') {
-      v = {}
-      for (var t in begin[i][k]) {
-        v[t] = (t in end[i][k]) ? Math.round(((end[i][k][t] - begin[i][k][t]) * pos + begin[i][k][t]) * thousand) / thousand : begin[i][k][t]
-      }
-      return v
-    } else if (typeof begin[i][k] == 'string') {
-      return nextColor(pos, begin[i][k], end[i][k])
+  function parseCSS(k, s) {
+    s = '' + s // convert to string
+    var i = 0
+      , a = []
+      , x
+    while (s[i]) {
+      x = parseCSS1(k, s, 0)
+      a.push(x.value)
+      i = x.index
+    }
+    if (a.length === 1) {
+      return a[0]
     } else {
-      // round so we don't get crazy long floats
-      v = Math.round(((end[i][k] - begin[i][k]) * pos + begin[i][k]) * thousand) / thousand
-      // some css properties don't require a unit (like zIndex, lineHeight, opacity)
-      if (!(k in unitless)) v += units[i][k] || 'px'
-      return v
+      return { type: 'multi', args: a }
+    }
+  }
+
+  /**
+    * makeTweener:
+    * @param x: parsed CSS object which represents the start of the animation
+    * @param y: parsed CSS object which represents the end of the animation
+    * @returns a function which when given a position returns the interpolated style
+    */
+  function makeTweener(x, y) {
+    switch (x.type) {
+    case 'number':
+      var diff = y.value - x.value
+      return function (pos) {
+        // round so we don't get crazy long floats
+        return Math.round((x.value + (diff * pos)) * thousand) / thousand + x.unit
+      }
+    case 'multi':
+      x.args = x.args.map(function (x, i) {
+        return makeTweener(x, y.args[i])
+      })
+      return function (pos) {
+        return x.args.map(function (f) { return f(pos) }).join(' ')
+      }
+    case 'function':
+      // Normalize to rgba
+      if (x.value === 'rgb') {
+        x.args.push({ type: 'number', value: 1, unit: '' })
+        x.value = 'rgba'
+      }
+      if (y.value === 'rgb') {
+        y.args.push({ type: 'number', value: 1, unit: '' })
+        x.value = 'rgba'
+      }
+      x.args = x.args.map(function (x, i) {
+        return makeTweener(x, y.args[i])
+      })
+      if (x.value === 'rgba') {
+        return function (pos) {
+          return x.value + '(' + Math.round(x.args[0](pos)) + ', ' +
+                                 Math.round(x.args[1](pos)) + ', ' +
+                                 Math.round(x.args[2](pos)) + ', ' +
+                                 x.args[3](pos) + ')'
+        }
+      } else {
+        return function (pos) {
+          return x.value + '(' + x.args.map(function (f) { return f(pos) }).join(', ') + ')'
+        }
+      }
+      break // TODO: useless break but JSHint complained about it
+    case 'normal':
+      return function (pos) {
+        return pos > 0.5 ? y.value : x.value
+      }
     }
   }
 
-  // support for relative movement via '+=n' or '-=n'
-  function by(val, start, m, r, i) {
-    return (m = relVal.exec(val)) ?
-      (i = parseFloat(m[2])) && (start + (m[1] == '+' ? 1 : -1) * i) :
-      parseFloat(val)
+  function getRelative(x, y) {
+    switch (y.type) {
+    case 'number':
+      // Relative values with += and -=
+      if (y.relative === '+') {
+        y.value = x.value + y.value
+      } else if (y.relative === '-') {
+        y.value = x.value - y.value
+      }
+      return y.value + y.unit
+    case 'multi':
+      y.args = y.args.map(function (y, i) {
+        return getRelative(x.args[i], y)
+      })
+      return y.args.join(' ')
+    // TODO Should this normalize to rgba?
+    case 'function':
+      y.args = y.args.map(function (y, i) {
+        return getRelative(x.args[i], y)
+      })
+      return y.value + '(' + y.args.join(', ') + ')'
+    case 'normal':
+      return y.value
+    }
+  }
+
+  function opacity(f) {
+    return function (pos) {
+                                       // TODO: this coerces from a string to a number
+      return 'alpha(opacity=' + f(pos) * 100 + ')'
+    }
+  }
+
+  function getOption(v, el) {
+    return fun(v) ? v(el) : v
   }
 
   /**
@@ -290,102 +394,104 @@
     *     - this may also be a function that receives element to be animated. it must return a value
     */
   function morpheus(elements, options) {
-    var els = elements ? (els = isFinite(elements.length) ? elements : [elements]) : [], i
-      , complete = options.complete
+    var complete = options.complete
       , duration = options.duration
-      , ease = options.easing
-      , points = options.bezier
-      , begin = []
-      , end = []
-      , units = []
-      , bez = []
-      , originalLeft
-      , originalTop
-
-    if (points) {
-      // remember the original values for top|left
-      originalLeft = options.left;
-      originalTop = options.top;
-      delete options.right;
-      delete options.bottom;
-      delete options.left;
-      delete options.top;
-    }
+      , ease     = options.easing
+      , points   = options.bezier
+      , a        = []
+      , els      = (elements
+                     ? (els = isFinite(elements.length)
+                         ? elements
+                         : [elements])
+                     : [])
+      , old
+      , begin
+      , end
+      , camel
+      , bez
+      , i
+      , k
 
     for (i = els.length; i--;) {
-
-      // record beginning and end states to calculate positions
-      begin[i] = {}
-      end[i] = {}
-      units[i] = {}
-
-      // are we 'moving'?
       if (points) {
-
         var left = getStyle(els[i], 'left')
-          , top = getStyle(els[i], 'top')
-          , xy = [by(fun(originalLeft) ? originalLeft(els[i]) : originalLeft || 0, parseFloat(left)),
-                  by(fun(originalTop) ? originalTop(els[i]) : originalTop || 0, parseFloat(top))]
-
-        bez[i] = fun(points) ? points(els[i], xy) : points
-        bez[i].push(xy)
-        bez[i].unshift([
+          , top  = getStyle(els[i], 'top')
+          , xy   = []
+
+        // TODO: pretty ridiculous; split it into multiple statements, or simplify it?
+        xy.push(parseFloat(getRelative(parseCSS('left', left),
+                                       parseCSS('left', options.left
+                                                         ? getOption(options.left, els[i])
+                                                         : 0))))
+        xy.push(parseFloat(getRelative(parseCSS('top', top),
+                                       parseCSS('top', options.top
+                                                         ? getOption(options.top, els[i])
+                                                         : 0))))
+
+        bez = fun(points) ? points(els[i], xy) : points
+        bez.push(xy)
+        bez.unshift([
           parseInt(left, 10),
           parseInt(top, 10)
         ])
+        a.push({ element: els[i], bezier: bez })
       }
 
-      for (var k in options) {
+      for (k in options) {
         switch (k) {
         case 'complete':
         case 'duration':
         case 'easing':
         case 'bezier':
-          continue;
-          break
+          continue
         }
-        var v = getStyle(els[i], k), unit
-          , tmp = fun(options[k]) ? options[k](els[i]) : options[k]
-        if (typeof tmp == 'string' &&
-            rgbOhex.test(tmp) &&
-            !rgbOhex.test(v)) {
-          delete options[k]; // remove key :(
-          continue; // cannot animate colors like 'orange' or 'transparent'
-                    // only #xxx, #xxxxxx, rgb(n,n,n)
+
+        if (points) {
+          switch (k) {
+          case 'left':
+          case 'top':
+          case 'bottom':
+          case 'right':
+            continue
+          }
+        }
+
+        if (k === 'transform') {
+          camel = transform
+        } else {
+          camel = camelize(k)
         }
 
-        begin[i][k] = k == 'transform' ? parseTransform(v) :
-          typeof tmp == 'string' && rgbOhex.test(tmp) ?
-            toHex(v).slice(1) :
-            parseFloat(v)
-        end[i][k] = k == 'transform' ? parseTransform(tmp, begin[i][k]) :
-          typeof tmp == 'string' && tmp.charAt(0) == '#' ?
-            toHex(tmp).slice(1) :
-            by(tmp, parseFloat(v));
-        // record original unit
-        (typeof tmp == 'string') && (unit = tmp.match(numUnit)) && (units[i][k] = unit[1])
+        old   = els[i].style[camel]
+        begin = parseCSS(camel, getStyle(els[i], camel))
+        // TODO: inefficient and very hacky, but I don't see a better way to make relative units work
+        els[i].style[camel] = getRelative(begin, parseCSS(camel, getOption(options[k], els[i])))
+        end   = parseCSS(camel, getStyle(els[i], camel))
+        els[i].style[camel] = old
+
+        if (camel === 'opacity' && !opasity) {
+          a.push({ element: els[i]
+                 , style:   'filter'
+                 , value:   opacity(makeTweener(begin, end)) })
+        } else {
+          a.push({ element: els[i]
+                 , style:   camel
+                 , value:   makeTweener(begin, end) })
+        }
       }
     }
     // ONE TWEEN TO RULE THEM ALL
-    return tween.apply(els, [duration, function (pos, v, xy) {
-      // normally not a fan of optimizing for() loops, but we want something
-      // fast for animating
-      for (i = els.length; i--;) {
-        if (points) {
-          xy = bezier(bez[i], pos)
-          els[i].style.left = xy[0] + 'px'
-          els[i].style.top = xy[1] + 'px'
-        }
-        for (var k in options) {
-          v = getTweenVal(pos, units, begin, end, k, i)
-          k == 'transform' ?
-            els[i].style[transform] = formatTransform(v) :
-            k == 'opacity' && !opasity ?
-              (els[i].style.filter = 'alpha(opacity=' + (v * 100) + ')') :
-              (els[i].style[camelize(k)] = v)
+    return tween.call(els, duration, function (pos) {
+      for (i = a.length; i--;) {
+        if (a[i].bezier) {
+          var xy = bezier(a[i].bezier, pos)
+          a[i].element.style.left = xy[0] + 'px'
+          a[i].element.style.top  = xy[1] + 'px'
+        } else {
+          a[i].element.style[a[i].style] = a[i].value(pos)
         }
       }
-    }, complete, ease])
+    }, complete, ease)
   }
 
   // expose useful methods
@@ -393,8 +499,6 @@
   morpheus.getStyle = getStyle
   morpheus.bezier = bezier
   morpheus.transform = transform
-  morpheus.parseTransform = parseTransform
-  morpheus.formatTransform = formatTransform
   morpheus.easings = {}
 
   return morpheus
diff --git a/morpheus.min.js b/morpheus.min.js
index c0c9458..609b1a6 100644
--- a/morpheus.min.js
+++ b/morpheus.min.js
@@ -3,4 +3,4 @@
   * https://github.com/ded/morpheus - (c) Dustin Diaz 2011
   * License MIT
   */
-!function(e,t){typeof define=="function"?define(t):typeof module!="undefined"?module.exports=t():this[e]=t()}("morpheus",function(){function w(e,t,n){if(Array.prototype.indexOf)return e.indexOf(t);for(n=0;n<e.length;++n)if(e[n]===t)return n}function E(e){var t,n=b.length;r&&e>1e12&&(e=i());for(t=n;t--;)b[t](e);b.length&&y(E)}function S(e){b.push(e)===1&&y(E)}function x(e){var t,n=w(b,e);n>=0&&(t=b.slice(n+1),b.length=n,b=b.concat(t))}function T(e,t){var n={},r;if(r=e.match(l))n.rotate=H(r[1],t?t.rotate:null);if(r=e.match(c))n.scale=H(r[1],t?t.scale:null);if(r=e.match(h))n.skewx=H(r[1],t?t.skewx:null),n.skewy=H(r[3],t?t.skewy:null);if(r=e.match(p))n.translatex=H(r[1],t?t.translatex:null),n.translatey=H(r[3],t?t.translatey:null);return n}function N(e){var t="";return"rotate"in e&&(t+="rotate("+e.rotate+"deg) "),"scale"in e&&(t+="scale("+e.scale+") "),"translatex"in e&&(t+="translate("+e.translatex+"px,"+e.translatey+"px) "),"skewx"in e&&(t+="skew("+e.skewx+"deg,"+e.skewy+"deg)"),t}function C(e,t,n){return"#"+(1<<24|e<<16|t<<8|n).toString(16).slice(1)}function k(e){var t=e.match(/rgba?\((\d+),\s*(\d+),\s*(\d+)/);return(t?C(t[1],t[2],t[3]):e).replace(/#(\w)(\w)(\w)$/,"#$1$1$2$2$3$3")}function L(e){return e.replace(/-(.)/g,function(e,t){return t.toUpperCase()})}function A(e){return typeof e=="function"}function O(e){return Math.sin(e*Math.PI/2)}function M(e,t,n,r,s,u){function d(e){var i=e-c;if(i>a||h)return u=isFinite(u)?u:1,h?p&&t(u):t(u),x(d),n&&n.apply(f);isFinite(u)?t(l*r(i/a)+s):t(r(i/a))}r=A(r)?r:B.easings[r]||O;var a=e||o,f=this,l=u-s,c=i(),h=0,p=0;return S(d),{stop:function(e){h=1,p=e,e||(n=null)}}}function _(e,t){var n=e.length,r=[],i,s;for(i=0;i<n;++i)r[i]=[e[i][0],e[i][1]];for(s=1;s<n;++s)for(i=0;i<n-s;++i)r[i][0]=(1-t)*r[i][0]+t*r[parseInt(i+1,10)][0],r[i][1]=(1-t)*r[i][1]+t*r[parseInt(i+1,10)][1];return[r[0][0],r[0][1]]}function D(e,t,n){var r=[],i,s,o,u;for(i=0;i<6;i++)o=Math.min(15,parseInt(t.charAt(i),16)),u=Math.min(15,parseInt(n.charAt(i),16)),s=Math.floor((u-o)*e+o),s=s>15?15:s<0?0:s,r[i]=s.toString(16);return"#"+r.join("")}function P(e,t,n,r,i,s,u){if(i=="transform"){u={};for(var a in n[s][i])u[a]=a in r[s][i]?Math.round(((r[s][i][a]-n[s][i][a])*e+n[s][i][a])*o)/o:n[s][i][a];return u}return typeof n[s][i]=="string"?D(e,n[s][i],r[s][i]):(u=Math.round(((r[s][i]-n[s][i])*e+n[s][i])*o)/o,i in d||(u+=t[s][i]||"px"),u)}function H(e,t,n,r,i){return(n=a.exec(e))?(i=parseFloat(n[2]))&&t+(n[1]=="+"?1:-1)*i:parseFloat(e)}function B(e,t){var n=e?n=isFinite(e.length)?e:[e]:[],r,i=t.complete,s=t.duration,o=t.easing,a=t.bezier,l=[],c=[],h=[],p=[],d,y;a&&(d=t.left,y=t.top,delete t.right,delete t.bottom,delete t.left,delete t.top);for(r=n.length;r--;){l[r]={},c[r]={},h[r]={};if(a){var b=g(n[r],"left"),w=g(n[r],"top"),E=[H(A(d)?d(n[r]):d||0,parseFloat(b)),H(A(y)?y(n[r]):y||0,parseFloat(w))];p[r]=A(a)?a(n[r],E):a,p[r].push(E),p[r].unshift([parseInt(b,10),parseInt(w,10)])}for(var S in t){switch(S){case"complete":case"duration":case"easing":case"bezier":continue}var x=g(n[r],S),C,O=A(t[S])?t[S](n[r]):t[S];if(typeof O=="string"&&u.test(O)&&!u.test(x)){delete t[S];continue}l[r][S]=S=="transform"?T(x):typeof O=="string"&&u.test(O)?k(x).slice(1):parseFloat(x),c[r][S]=S=="transform"?T(O,l[r][S]):typeof O=="string"&&O.charAt(0)=="#"?k(O).slice(1):H(O,parseFloat(x)),typeof O=="string"&&(C=O.match(f))&&(h[r][S]=C[1])}}return M.apply(n,[s,function(e,i,s){for(r=n.length;r--;){a&&(s=_(p[r],e),n[r].style.left=s[0]+"px",n[r].style.top=s[1]+"px");for(var o in t)i=P(e,h,l,c,o,r),o=="transform"?n[r].style[v]=N(i):o=="opacity"&&!m?n[r].style.filter="alpha(opacity="+i*100+")":n[r].style[L(o)]=i}},i,o])}var e=document,t=window,n=t.performance,r=n&&(n.now||n.webkitNow||n.msNow||n.mozNow),i=r?function(){return r.call(n)}:function(){return+(new Date)},s=e.documentElement,o=1e3,u=/^rgb\(|#/,a=/^([+\-])=([\d\.]+)/,f=/^(?:[\+\-]=)?\d+(?:\.\d+)?(%|in|cm|mm|em|ex|pt|pc|px)$/,l=/rotate\(((?:[+\-]=)?([\-\d\.]+))deg\)/,c=/scale\(((?:[+\-]=)?([\d\.]+))\)/,h=/skew\(((?:[+\-]=)?([\-\d\.]+))deg, ?((?:[+\-]=)?([\-\d\.]+))deg\)/,p=/translate\(((?:[+\-]=)?([\-\d\.]+))px, ?((?:[+\-]=)?([\-\d\.]+))px\)/,d={lineHeight:1,zoom:1,zIndex:1,opacity:1,transform:1},v=function(){var t=e.createElement("a").style,n=["webkitTransform","MozTransform","OTransform","msTransform","Transform"],r;for(r=0;r<n.length;r++)if(n[r]in t)return n[r]}(),m=function(){return typeof e.createElement("a").style.opacity!="undefined"}(),g=e.defaultView&&e.defaultView.getComputedStyle?function(t,n){n=n=="transform"?v:n;var r=null,i=e.defaultView.getComputedStyle(t,"");return i&&(r=i[L(n)]),t.style[n]||r}:s.currentStyle?function(e,t){t=L(t);if(t=="opacity"){var n=100;try{n=e.filters["DXImageTransform.Microsoft.Alpha"].opacity}catch(r){try{n=e.filters("alpha").opacity}catch(i){}}return n/100}var s=e.currentStyle?e.currentStyle[t]:null;return e.style[t]||s}:function(e,t){return e.style[L(t)]},y=function(){return t.requestAnimationFrame||t.webkitRequestAnimationFrame||t.mozRequestAnimationFrame||t.msRequestAnimationFrame||t.oRequestAnimationFrame||function(e){t.setTimeout(function(){e(+(new Date))},17)}}(),b=[];return B.tween=M,B.getStyle=g,B.bezier=_,B.transform=v,B.parseTransform=T,B.formatTransform=N,B.easings={},B})
\ No newline at end of file
+!function(e,t){typeof define=="function"?define(t):typeof module!="undefined"?module.exports=t():this[e]=t()}("morpheus",function(){function p(e,t,n){if(Array.prototype.indexOf)return e.indexOf(t);for(n=0;n<e.length;++n)if(e[n]===t)return n}function d(e){var t,n=h.length;r&&e>1e12&&(e=i());for(t=n;t--;)h[t](e);h.length&&c(d)}function v(e){h.push(e)===1&&c(d)}function m(e){var t,n=p(h,e);n>=0&&(t=h.slice(n+1),h.length=n,h=h.concat(t))}function g(e){return e.replace(/-(.)/g,function(e,t){return t.toUpperCase()})}function y(e){return typeof e=="function"}function b(e){return Math.sin(e*Math.PI/2)}function w(e,t,n,r,s,u){function d(e){var i=e-c;if(i>a||h)return u=isFinite(u)?u:1,h?p&&t(u):t(u),m(d),n&&n.apply(f);isFinite(u)?t(l*r(i/a)+s):t(r(i/a))}r=y(r)?r:L.easings[r]||b;var a=e||o,f=this,l=u-s,c=i(),h=0,p=0;return v(d),{stop:function(e){h=1,p=e,e||(n=null)}}}function E(e,t){var n=e.length,r=[],i,s;for(i=0;i<n;++i)r[i]=[e[i][0],e[i][1]];for(s=1;s<n;++s)for(i=0;i<n-s;++i)r[i][0]=(1-t)*r[i][0]+t*r[parseInt(i+1,10)][0],r[i][1]=(1-t)*r[i][1]+t*r[parseInt(i+1,10)][1];return[r[0][0],r[0][1]]}function S(e,t,n){var r,i,s=[],o=n;if(/[+\-0-9]/.test(t[n])){r={type:"number"},/[+\-]/.test(t[n])&&(t[n+1]==="="?(r.relative=t[n],n+=2):(s.push(t[n]),n+=1));while(t[n]&&/[0-9\.]/.test(t[n]))s.push(t[n]),n+=1;r.value=+s.join(""),s=[];while(t[n]&&/[a-zA-Z%]/.test(t[n]))s.push(t[n]),n+=1;r.unit=s.join(""),r.unit===""&&!(e in u)&&(r.unit="px")}else{while(t[n]&&/[^\( ]/.test(t[n]))s.push(t[n]),n+=1;if(t[n]==="("){r={type:"function",value:s.join(""),args:[]},n+=1;while(t[n]){while(t[n]===" ")n+=1;i=S("opacity",t,n),r.args.push(i.value),n=i.index;if(t[n]===")"){n+=1;break}t[n]===","&&(n+=1)}}else r={type:"normal",value:s.join("")}}if(n===o)throw new Error("invalid CSS value "+t);return{value:r,index:n}}function x(e,t){t=""+t;var n=0,r=[],i;while(t[n])i=S(e,t,0),r.push(i.value),n=i.index;return r.length===1?r[0]:{type:"multi",args:r}}function T(e,t){switch(e.type){case"number":var n=t.value-e.value;return function(t){return Math.round((e.value+n*t)*o)/o+e.unit};case"multi":return e.args=e.args.map(function(e,n){return T(e,t.args[n])}),function(t){return e.args.map(function(e){return e(t)}).join(" ")};case"function":return e.value==="rgb"&&(e.args.push({type:"number",value:1,unit:""}),e.value="rgba"),t.value==="rgb"&&(t.args.push({type:"number",value:1,unit:""}),e.value="rgba"),e.args=e.args.map(function(e,n){return T(e,t.args[n])}),e.value==="rgba"?function(t){return e.value+"("+Math.round(e.args[0](t))+", "+Math.round(e.args[1](t))+", "+Math.round(e.args[2](t))+", "+e.args[3](t)+")"}:function(t){return e.value+"("+e.args.map(function(e){return e(t)}).join(", ")+")"};case"normal":return function(n){return n>.5?t.value:e.value}}}function N(e,t){switch(t.type){case"number":return t.relative==="+"?t.value=e.value+t.value:t.relative==="-"&&(t.value=e.value-t.value),t.value+t.unit;case"multi":return t.args=t.args.map(function(t,n){return N(e.args[n],t)}),t.args.join(" ");case"function":return t.args=t.args.map(function(t,n){return N(e.args[n],t)}),t.value+"("+t.args.join(", ")+")";case"normal":return t.value}}function C(e){return function(t){return"alpha(opacity="+e(t)*100+")"}}function k(e,t){return y(e)?e(t):e}function L(e,t){var n=t.complete,r=t.duration,i=t.easing,s=t.bezier,o=[],u=e?u=isFinite(e.length)?e:[e]:[],c,h,p,d,v,m,b;for(m=u.length;m--;){if(s){var S=l(u[m],"left"),L=l(u[m],"top"),A=[];A.push(parseFloat(N(x("left",S),x("left",t.left?k(t.left,u[m]):0)))),A.push(parseFloat(N(x("top",L),x("top",t.top?k(t.top,u[m]):0)))),v=y(s)?s(u[m],A):s,v.push(A),v.unshift([parseInt(S,10),parseInt(L,10)]),o.push({element:u[m],bezier:v})}for(b in t){switch(b){case"complete":case"duration":case"easing":case"bezier":continue}if(s)switch(b){case"left":case"top":case"bottom":case"right":continue}b==="transform"?d=a:d=g(b),c=u[m].style[d],h=x(d,l(u[m],d)),u[m].style[d]=N(h,x(d,k(t[b],u[m]))),p=x(d,l(u[m],d)),u[m].style[d]=c,d==="opacity"&&!f?o.push({element:u[m],style:"filter",value:C(T(h,p))}):o.push({element:u[m],style:d,value:T(h,p)})}}return w.call(u,r,function(e){for(m=o.length;m--;)if(o[m].bezier){var t=E(o[m].bezier,e);o[m].element.style.left=t[0]+"px",o[m].element.style.top=t[1]+"px"}else o[m].element.style[o[m].style]=o[m].value(e)},n,i)}var e=document,t=window,n=t.performance,r=n&&(n.now||n.webkitNow||n.msNow||n.mozNow),i=r?function(){return r.call(n)}:function(){return+(new Date)},s=e.documentElement,o=1e3,u={lineHeight:1,zoom:1,zIndex:1,opacity:1,transform:1},a=function(){var t=e.createElement("a").style,n=["webkitTransform","MozTransform","OTransform","msTransform","Transform"],r;for(r=0;r<n.length;r++)if(n[r]in t)return n[r]}(),f=function(){return typeof e.createElement("a").style.opacity!="undefined"}(),l=e.defaultView&&e.defaultView.getComputedStyle?function(t,n){n=n=="transform"?a:n;var r=null,i=e.defaultView.getComputedStyle(t,"");return i&&(r=i[g(n)]),t.style[n]||r}:s.currentStyle?function(e,t){t=g(t);if(t=="opacity"){var n=100;try{n=e.filters["DXImageTransform.Microsoft.Alpha"].opacity}catch(r){try{n=e.filters("alpha").opacity}catch(i){}}return n/100}var s=e.currentStyle?e.currentStyle[t]:null;return e.style[t]||s}:function(e,t){return e.style[g(t)]},c=function(){return t.requestAnimationFrame||t.webkitRequestAnimationFrame||t.mozRequestAnimationFrame||t.msRequestAnimationFrame||t.oRequestAnimationFrame||function(e){t.setTimeout(function(){e(+(new Date))},17)}}(),h=[];return L.tween=w,L.getStyle=l,L.bezier=E,L.transform=a,L.easings={},L})
\ No newline at end of file
diff --git a/src/morpheus.js b/src/morpheus.js
index 4fce165..a262326 100644
--- a/src/morpheus.js
+++ b/src/morpheus.js
@@ -11,13 +11,6 @@
     , now = perfNow ? function () { return perfNow.call(perf) } : function () { return +new Date() }
     , html = doc.documentElement
     , thousand = 1000
-    , rgbOhex = /^rgb\(|#/
-    , relVal = /^([+\-])=([\d\.]+)/
-    , numUnit = /^(?:[\+\-]=)?\d+(?:\.\d+)?(%|in|cm|mm|em|ex|pt|pc|px)$/
-    , rotate = /rotate\(((?:[+\-]=)?([\-\d\.]+))deg\)/
-    , scale = /scale\(((?:[+\-]=)?([\d\.]+))\)/
-    , skew = /skew\(((?:[+\-]=)?([\-\d\.]+))deg, ?((?:[+\-]=)?([\-\d\.]+))deg\)/
-    , translate = /translate\(((?:[+\-]=)?([\-\d\.]+))px, ?((?:[+\-]=)?([\-\d\.]+))px\)/
       // these elements do not require 'px'
     , unitless = { lineHeight: 1, zoom: 1, zIndex: 1, opacity: 1, transform: 1}
 
@@ -37,6 +30,7 @@
   }()
 
   // initial style is determined by the elements themselves
+  // TODO: redundant camelize, but getStyle is exposed to the outside world, so removing this might break compatibility
   var getStyle = doc.defaultView && doc.defaultView.getComputedStyle ?
     function (el, property) {
       property = property == 'transform' ? transform : property
@@ -116,35 +110,6 @@
     }
   }
 
-  function parseTransform(style, base) {
-    var values = {}, m
-    if (m = style.match(rotate)) values.rotate = by(m[1], base ? base.rotate : null)
-    if (m = style.match(scale)) values.scale = by(m[1], base ? base.scale : null)
-    if (m = style.match(skew)) {values.skewx = by(m[1], base ? base.skewx : null); values.skewy = by(m[3], base ? base.skewy : null)}
-    if (m = style.match(translate)) {values.translatex = by(m[1], base ? base.translatex : null); values.translatey = by(m[3], base ? base.translatey : null)}
-    return values
-  }
-
-  function formatTransform(v) {
-    var s = ''
-    if ('rotate' in v) s += 'rotate(' + v.rotate + 'deg) '
-    if ('scale' in v) s += 'scale(' + v.scale + ') '
-    if ('translatex' in v) s += 'translate(' + v.translatex + 'px,' + v.translatey + 'px) '
-    if ('skewx' in v) s += 'skew(' + v.skewx + 'deg,' + v.skewy + 'deg)'
-    return s
-  }
-
-  function rgb(r, g, b) {
-    return '#' + (1 << 24 | r << 16 | g << 8 | b).toString(16).slice(1)
-  }
-
-  // convert rgb and short hex to long hex
-  function toHex(c) {
-    var m = c.match(/rgba?\((\d+),\s*(\d+),\s*(\d+)/)
-    return (m ? rgb(m[1], m[2], m[3]) : c)
-      .replace(/#(\w)(\w)(\w)$/, '#$1$1$2$2$3$3') // short skirt to long jacket
-  }
-
   // change font-size => fontSize etc.
   function camelize(s) {
     return s.replace(/-(.)/g, function (m, m1) {
@@ -231,43 +196,182 @@
     return [r[0][0], r[0][1]]
   }
 
-  // this gets you the next hex in line according to a 'position'
-  function nextColor(pos, start, finish) {
-    var r = [], i, e, from, to
-    for (i = 0; i < 6; i++) {
-      from = Math.min(15, parseInt(start.charAt(i),  16))
-      to   = Math.min(15, parseInt(finish.charAt(i), 16))
-      e = Math.floor((to - from) * pos + from)
-      e = e > 15 ? 15 : e < 0 ? 0 : e
-      r[i] = e.toString(16)
+
+  // Takes a CSS "used value" and returns a parsed object
+  function parseCSS1(k, s, i) {
+    var x, y, a = [], old = i
+    // It's a number
+    if (/[+\-0-9]/.test(s[i])) {
+      x = { type: 'number' }
+      if (/[+\-]/.test(s[i])) {
+        if (s[i + 1] === '=') {
+          x.relative = s[i]
+          i += 2
+        } else {
+          a.push(s[i])
+          i += 1
+        }
+      }
+      while (s[i] && /[0-9\.]/.test(s[i])) {
+        a.push(s[i])
+        i += 1
+      }
+      x.value = +a.join('')
+
+      // This is for the optional unit
+      a = []
+      while (s[i] && /[a-zA-Z%]/.test(s[i])) {
+        a.push(s[i])
+        i += 1
+      }
+      x.unit = a.join('')
+
+      // TODO: pretty hacky
+      // some css properties don't require a unit (like zIndex, lineHeight, opacity)
+      if (x.unit === '' && !(k in unitless)) {
+        x.unit = 'px'
+      }
+    } else {
+      while (s[i] && /[^\( ]/.test(s[i])) {
+        a.push(s[i])
+        i += 1
+      }
+      // It's a function
+      // TODO: doesn't currently handle stuff like `foo(bar qux, corge)`
+      if (s[i] === '(') {
+        x = { type: 'function', value: a.join(''), args: [] }
+        i += 1
+        while (s[i]) {
+          while (s[i] === ' ') {
+            i += 1
+          }
+          y = parseCSS1('opacity', s, i)
+          x.args.push(y.value)
+          i = y.index
+          if (s[i] === ')') {
+            i += 1
+            break
+          } else if (s[i] === ',') {
+            i += 1
+          }
+        }
+      // It's a normal value
+      } else {
+        x = { type: 'normal', value: a.join('') }
+      }
+    }
+    if (i === old) {
+      throw new Error('invalid CSS value ' + s)
     }
-    return '#' + r.join('')
+    return { value: x, index: i }
   }
 
-  // this retreives the frame value within a sequence
-  function getTweenVal(pos, units, begin, end, k, i, v) {
-    if (k == 'transform') {
-      v = {}
-      for (var t in begin[i][k]) {
-        v[t] = (t in end[i][k]) ? Math.round(((end[i][k][t] - begin[i][k][t]) * pos + begin[i][k][t]) * thousand) / thousand : begin[i][k][t]
-      }
-      return v
-    } else if (typeof begin[i][k] == 'string') {
-      return nextColor(pos, begin[i][k], end[i][k])
+  function parseCSS(k, s) {
+    s = '' + s // convert to string
+    var i = 0
+      , a = []
+      , x
+    while (s[i]) {
+      x = parseCSS1(k, s, 0)
+      a.push(x.value)
+      i = x.index
+    }
+    if (a.length === 1) {
+      return a[0]
     } else {
-      // round so we don't get crazy long floats
-      v = Math.round(((end[i][k] - begin[i][k]) * pos + begin[i][k]) * thousand) / thousand
-      // some css properties don't require a unit (like zIndex, lineHeight, opacity)
-      if (!(k in unitless)) v += units[i][k] || 'px'
-      return v
+      return { type: 'multi', args: a }
+    }
+  }
+
+  /**
+    * makeTweener:
+    * @param x: parsed CSS object which represents the start of the animation
+    * @param y: parsed CSS object which represents the end of the animation
+    * @returns a function which when given a position returns the interpolated style
+    */
+  function makeTweener(x, y) {
+    switch (x.type) {
+    case 'number':
+      var diff = y.value - x.value
+      return function (pos) {
+        // round so we don't get crazy long floats
+        return Math.round((x.value + (diff * pos)) * thousand) / thousand + x.unit
+      }
+    case 'multi':
+      x.args = x.args.map(function (x, i) {
+        return makeTweener(x, y.args[i])
+      })
+      return function (pos) {
+        return x.args.map(function (f) { return f(pos) }).join(' ')
+      }
+    case 'function':
+      // Normalize to rgba
+      if (x.value === 'rgb') {
+        x.args.push({ type: 'number', value: 1, unit: '' })
+        x.value = 'rgba'
+      }
+      if (y.value === 'rgb') {
+        y.args.push({ type: 'number', value: 1, unit: '' })
+        x.value = 'rgba'
+      }
+      x.args = x.args.map(function (x, i) {
+        return makeTweener(x, y.args[i])
+      })
+      if (x.value === 'rgba') {
+        return function (pos) {
+          return x.value + '(' + Math.round(x.args[0](pos)) + ', ' +
+                                 Math.round(x.args[1](pos)) + ', ' +
+                                 Math.round(x.args[2](pos)) + ', ' +
+                                 x.args[3](pos) + ')'
+        }
+      } else {
+        return function (pos) {
+          return x.value + '(' + x.args.map(function (f) { return f(pos) }).join(', ') + ')'
+        }
+      }
+      break // TODO: useless break but JSHint complained about it
+    case 'normal':
+      return function (pos) {
+        return pos > 0.5 ? y.value : x.value
+      }
     }
   }
 
-  // support for relative movement via '+=n' or '-=n'
-  function by(val, start, m, r, i) {
-    return (m = relVal.exec(val)) ?
-      (i = parseFloat(m[2])) && (start + (m[1] == '+' ? 1 : -1) * i) :
-      parseFloat(val)
+  function getRelative(x, y) {
+    switch (y.type) {
+    case 'number':
+      // Relative values with += and -=
+      if (y.relative === '+') {
+        y.value = x.value + y.value
+      } else if (y.relative === '-') {
+        y.value = x.value - y.value
+      }
+      return y.value + y.unit
+    case 'multi':
+      y.args = y.args.map(function (y, i) {
+        return getRelative(x.args[i], y)
+      })
+      return y.args.join(' ')
+    // TODO Should this normalize to rgba?
+    case 'function':
+      y.args = y.args.map(function (y, i) {
+        return getRelative(x.args[i], y)
+      })
+      return y.value + '(' + y.args.join(', ') + ')'
+    case 'normal':
+      return y.value
+    }
+  }
+
+  function opacity(f) {
+    return function (pos) {
+                                       // TODO: this coerces from a string to a number
+      return 'alpha(opacity=' + f(pos) * 100 + ')'
+    }
+  }
+
+  function getOption(v, el) {
+    return fun(v) ? v(el) : v
   }
 
   /**
@@ -285,102 +389,104 @@
     *     - this may also be a function that receives element to be animated. it must return a value
     */
   function morpheus(elements, options) {
-    var els = elements ? (els = isFinite(elements.length) ? elements : [elements]) : [], i
-      , complete = options.complete
+    var complete = options.complete
       , duration = options.duration
-      , ease = options.easing
-      , points = options.bezier
-      , begin = []
-      , end = []
-      , units = []
-      , bez = []
-      , originalLeft
-      , originalTop
-
-    if (points) {
-      // remember the original values for top|left
-      originalLeft = options.left;
-      originalTop = options.top;
-      delete options.right;
-      delete options.bottom;
-      delete options.left;
-      delete options.top;
-    }
+      , ease     = options.easing
+      , points   = options.bezier
+      , a        = []
+      , els      = (elements
+                     ? (els = isFinite(elements.length)
+                         ? elements
+                         : [elements])
+                     : [])
+      , old
+      , begin
+      , end
+      , camel
+      , bez
+      , i
+      , k
 
     for (i = els.length; i--;) {
-
-      // record beginning and end states to calculate positions
-      begin[i] = {}
-      end[i] = {}
-      units[i] = {}
-
-      // are we 'moving'?
       if (points) {
-
         var left = getStyle(els[i], 'left')
-          , top = getStyle(els[i], 'top')
-          , xy = [by(fun(originalLeft) ? originalLeft(els[i]) : originalLeft || 0, parseFloat(left)),
-                  by(fun(originalTop) ? originalTop(els[i]) : originalTop || 0, parseFloat(top))]
-
-        bez[i] = fun(points) ? points(els[i], xy) : points
-        bez[i].push(xy)
-        bez[i].unshift([
+          , top  = getStyle(els[i], 'top')
+          , xy   = []
+
+        // TODO: pretty ridiculous; split it into multiple statements, or simplify it?
+        xy.push(parseFloat(getRelative(parseCSS('left', left),
+                                       parseCSS('left', options.left
+                                                         ? getOption(options.left, els[i])
+                                                         : 0))))
+        xy.push(parseFloat(getRelative(parseCSS('top', top),
+                                       parseCSS('top', options.top
+                                                         ? getOption(options.top, els[i])
+                                                         : 0))))
+
+        bez = fun(points) ? points(els[i], xy) : points
+        bez.push(xy)
+        bez.unshift([
           parseInt(left, 10),
           parseInt(top, 10)
         ])
+        a.push({ element: els[i], bezier: bez })
       }
 
-      for (var k in options) {
+      for (k in options) {
         switch (k) {
         case 'complete':
         case 'duration':
         case 'easing':
         case 'bezier':
-          continue;
-          break
+          continue
         }
-        var v = getStyle(els[i], k), unit
-          , tmp = fun(options[k]) ? options[k](els[i]) : options[k]
-        if (typeof tmp == 'string' &&
-            rgbOhex.test(tmp) &&
-            !rgbOhex.test(v)) {
-          delete options[k]; // remove key :(
-          continue; // cannot animate colors like 'orange' or 'transparent'
-                    // only #xxx, #xxxxxx, rgb(n,n,n)
+
+        if (points) {
+          switch (k) {
+          case 'left':
+          case 'top':
+          case 'bottom':
+          case 'right':
+            continue
+          }
+        }
+
+        if (k === 'transform') {
+          camel = transform
+        } else {
+          camel = camelize(k)
         }
 
-        begin[i][k] = k == 'transform' ? parseTransform(v) :
-          typeof tmp == 'string' && rgbOhex.test(tmp) ?
-            toHex(v).slice(1) :
-            parseFloat(v)
-        end[i][k] = k == 'transform' ? parseTransform(tmp, begin[i][k]) :
-          typeof tmp == 'string' && tmp.charAt(0) == '#' ?
-            toHex(tmp).slice(1) :
-            by(tmp, parseFloat(v));
-        // record original unit
-        (typeof tmp == 'string') && (unit = tmp.match(numUnit)) && (units[i][k] = unit[1])
+        old   = els[i].style[camel]
+        begin = parseCSS(camel, getStyle(els[i], camel))
+        // TODO: inefficient and very hacky, but I don't see a better way to make relative units work
+        els[i].style[camel] = getRelative(begin, parseCSS(camel, getOption(options[k], els[i])))
+        end   = parseCSS(camel, getStyle(els[i], camel))
+        els[i].style[camel] = old
+
+        if (camel === 'opacity' && !opasity) {
+          a.push({ element: els[i]
+                 , style:   'filter'
+                 , value:   opacity(makeTweener(begin, end)) })
+        } else {
+          a.push({ element: els[i]
+                 , style:   camel
+                 , value:   makeTweener(begin, end) })
+        }
       }
     }
     // ONE TWEEN TO RULE THEM ALL
-    return tween.apply(els, [duration, function (pos, v, xy) {
-      // normally not a fan of optimizing for() loops, but we want something
-      // fast for animating
-      for (i = els.length; i--;) {
-        if (points) {
-          xy = bezier(bez[i], pos)
-          els[i].style.left = xy[0] + 'px'
-          els[i].style.top = xy[1] + 'px'
-        }
-        for (var k in options) {
-          v = getTweenVal(pos, units, begin, end, k, i)
-          k == 'transform' ?
-            els[i].style[transform] = formatTransform(v) :
-            k == 'opacity' && !opasity ?
-              (els[i].style.filter = 'alpha(opacity=' + (v * 100) + ')') :
-              (els[i].style[camelize(k)] = v)
+    return tween.call(els, duration, function (pos) {
+      for (i = a.length; i--;) {
+        if (a[i].bezier) {
+          var xy = bezier(a[i].bezier, pos)
+          a[i].element.style.left = xy[0] + 'px'
+          a[i].element.style.top  = xy[1] + 'px'
+        } else {
+          a[i].element.style[a[i].style] = a[i].value(pos)
         }
       }
-    }, complete, ease])
+    }, complete, ease)
   }
 
   // expose useful methods
@@ -388,8 +494,6 @@
   morpheus.getStyle = getStyle
   morpheus.bezier = bezier
   morpheus.transform = transform
-  morpheus.parseTransform = parseTransform
-  morpheus.formatTransform = formatTransform
   morpheus.easings = {}
 
   return morpheus
diff --git a/tests/tests.html b/tests/tests.html
index e024c24..f316230 100644
--- a/tests/tests.html
+++ b/tests/tests.html
@@ -146,6 +146,37 @@ <h1>Morpheus Tests</h1>
           })
         })
 
+        test('should accept rgb function', 1, function () {
+          morpheus(el, {
+            color: 'rgb(10, 20, 30)',
+            duration: 10,
+            complete: function () {
+              ok(el.style.color == 'rgb(10, 20, 30)', 'color is rgb(10, 20, 30)')
+            }
+          })
+        })
+
+        test('should accept hsl function', 1, function () {
+          morpheus(el, {
+            color: 'hsl(50, 75%, 50%)',
+            duration: 10,
+            complete: function () {
+              ok(el.style.color == 'rgb(223, 191, 31)', 'color is rgb(223, 191, 31)')
+            }
+          })
+        })
+
+        test('should work with transparent colors', 1, function () {
+          el.style.color = 'hsla(10, 100%, 25%, 0.75)'
+          morpheus(el, {
+            color: 'hsla(50, 75%, 50%, 0.2)',
+            duration: 10,
+            complete: function () {
+              ok(el.style.color == 'rgba(223, 191, 31, 0.2)', 'color is rgb(223, 191, 31, 0.2)')
+            }
+          })
+        })
+
       });
 
       sink('Syntax', function (test, ok) {
@@ -175,32 +206,32 @@ <h1>Morpheus Tests</h1>
       })
 
       var transformTest = function(test, ok, title, start, transform, verify) {
-        verify = typeof verify == 'string' ? [verify] : verify
+        if (verify == null) {
+          verify = transform
+        }
         var el = document.getElementById('test')
-        test(title, verify.length, function() {
+        test(title, 1, function() {
           el.style[morpheus.transform] = start
           morpheus(el, {
             transform: transform,
             duration: 10,
             complete: function () {
-              var v = morpheus.parseTransform(el.style[morpheus.transform])
-              for (var i = 0; i < verify.length; i++) {
-                ok(eval(verify[i]), verify[i])
-              }
+              ok(el.style[morpheus.transform] == verify, verify)
             }
           })
         })
       }
 
       sink('Transform', function(test, ok, before, after) {
-        transformTest(test, ok, 'should accept absolute rotate','rotate(30deg)','rotate(40deg)','v.rotate == 40')
-        transformTest(test, ok, 'should accept relative rotate','rotate(10deg)','rotate(-=20deg)','v.rotate == -10 || v.rotate == 350')
-        transformTest(test, ok, 'should accept absolute scale','scale(1)','scale(3)','v.scale == 3')
-        transformTest(test, ok, 'should accept relative scale','scale(1)','scale(+=3)','v.scale == 4')
-        transformTest(test, ok, 'should accept absolute skew','skew(10deg,10deg)','skew(30deg,90deg)',['v.skewx == 30','v.skewy == 90'])
-        transformTest(test, ok, 'should accept relative skew','skew(10deg,10deg)','skew(+=30deg,-=6deg)',['v.skewx == 40','v.skewy == 4'])
-        transformTest(test, ok, 'should accept absolute translate','translate(-10px,0px)','translate(30px,99px)',['v.translatex == 30','v.translatey == 99'])
-        transformTest(test, ok, 'should accept relative translate','translate(100px,100px)','translate(+=30px,-=106px)',['v.translatex == 130','v.translatey == -6'])
+        transformTest(test, ok, 'should accept absolute rotate','rotate(30deg)','rotate(40deg)')
+        transformTest(test, ok, 'should accept relative rotate','rotate(10deg)','rotate(-=20deg)', 'rotate(-10deg)')
+        transformTest(test, ok, 'should accept absolute scale','scale(1)','scale(3)')
+        transformTest(test, ok, 'should accept relative scale','scale(1)','scale(+=3)', 'scale(4)')
+        transformTest(test, ok, 'should accept absolute skew','skew(10deg,10deg)','skew(30deg, 90deg)')
+        transformTest(test, ok, 'should accept relative skew','skew(10deg,10deg)','skew(+=30deg,-=6deg)', 'skew(40deg, 4deg)')
+        transformTest(test, ok, 'should accept absolute translate','translate(-10px,0px)','translate(30px, 99px)')
+        transformTest(test, ok, 'should accept relative translate','translate(100px,100px)','translate(+=30px,-=106px)', 'translate(130px, -6px)')
+        transformTest(test, ok, 'should accept scaleY','scaleY(0)','scaleY(0.5)')
       })
 
       sink('Out', function (test, ok) {