diff --git a/README.md b/README.md
index 3e14102..5379fb1 100644
--- a/README.md
+++ b/README.md
@@ -16,7 +16,7 @@ README.md file is automatically generated.
 **[Documentation](#documentation) |**
 
 ---
-### Current version: v2.0.8 (2013-11-21)
+### Current version: v2.0.9 (2013-11-22)
 ## Intro
 Why LESS Hat? In August 2012, while we were developing and extending [CSS Hat](www.csshat.com) for LESS we needed universal mixins. Unfortunately, none of available were good enough that would satisfy our needs and that’s  why we created new custom ones on our own, which have become the most popular mixin library for the whole LESS CSS. 
 
@@ -2637,7 +2637,19 @@ Resources: **[WebPlatform](http://docs.webplatform.org/wiki/css/properties/trans
           time += 's';
         }
 
-  And also properties inside `transition` definition are automatically prefixed, if it is needed.
+  And also properties inside `transition` definition are automatically prefixed, if it is needed.  
+  **W3C property value is appending all prefixed values.**  
+  Why? Some browsers support W3C unprefixed property, but value must be sometimes prefixed.
+  Let's consider this example:
+
+    div {
+    -webkit-transition: -webkit-filter .3s ease;
+    -moz-transition: -moz-filter .3s ease;
+    -o-transition: filter .3s ease;
+
+    // There is a problem! Webkit needs -webkit-filter property
+    transition: filter .3s ease;
+    }
 
 **Example:**
 
@@ -2748,7 +2760,19 @@ Resources: **[WebPlatform](http://docs.webplatform.org/wiki/css/properties/trans
 
 **Tips and tricks:**
 
-  And also properties inside `transition-property` definition are automatically prefixed, if it is needed.
+  And also properties inside `transition-property` definition are automatically prefixed, if it is needed.  
+  **W3C property value is appending all prefixed values.**  
+  Why? Some browsers support W3C unprefixed property, but value must be sometimes prefixed.
+  Let's consider this example:
+
+    div {
+    -webkit-transition: -webkit-filter .3s ease;
+    -moz-transition: -moz-filter .3s ease;
+    -o-transition: filter .3s ease;
+
+    // There is a problem! Webkit needs -webkit-filter property
+    transition: filter .3s ease;
+    }
 
 **Example:**
 
@@ -2758,10 +2782,10 @@ Resources: **[WebPlatform](http://docs.webplatform.org/wiki/css/properties/trans
     
     // Result
     div {
-     -webkit-transition-property: -webkit-box-shadow;
-     -moz-transition-property: -moz-box-shadow;
-     -o-transition-property: box-shadow;
-     transition-property: box-shadow;
+     -webkit-transition-property: -webkit-transform;
+     -moz-transition-property: -moz-transform;
+     -o-transition-property: -o-transform;
+     transition-property: -webkit-transform,-moz-transform,-o-transform,transform;
     }
 
 
diff --git a/bower.json b/bower.json
index 50e2b6c..7304814 100644
--- a/bower.json
+++ b/bower.json
@@ -1,5 +1,5 @@
 {
   "name": "lesshat",
-  "version": "2.0.8",
+  "version": "2.0.9",
   "main": "./build/lesshat.less"
 }
\ No newline at end of file
diff --git a/build/lesshat-prefixed.less b/build/lesshat-prefixed.less
index 509ee3e..159cffb 100644
--- a/build/lesshat-prefixed.less
+++ b/build/lesshat-prefixed.less
@@ -6,7 +6,7 @@
 // Handcrafted by Petr Brzek, lesshat.com
 // Works great with CSS Hat csshat.com
 
-// version: v2.0.8 (2013-11-21)
+// version: v2.0.9 (2013-11-22)
 
 // TABLE OF MIXINS:
 	// align-content
@@ -2562,9 +2562,9 @@
   @opera_local: true;
   @w3c_local: true;
 
-  @process_webkit: ~`(function(value){value=value||"all";var prefixedProperties=["background-size","border-radius","border-bottom-left-radius","border-bottom-right-radius","border-top-left-radius","border-top-right-radius","box-shadow","column","transform","filter"],prefix="-webkit-";return/^[-a-zA-Z0-9().\/]*,/.test(value)&&(value=value.replace(/(?:,)(?![^(]*\))/g,"")),prefixedProperties.forEach(function(property){-1!==value.indexOf(property)&&(value=value.replace(new RegExp(property,"g"),function(match){return prefix+match}))}),value})((function(){var args="@{arguments}";return args=args.replace(/^\[|\]$/g,"")})())`;
-  @process_moz: ~`(function(value){value=value||"all";var prefixedProperties=["background-size","box-shadow","column","transform","filter"],prefix="-moz-";return/^[-a-zA-Z0-9().\/]*,/.test(value)&&(value=value.replace(/(?:,)(?![^(]*\))/g,"")),prefixedProperties.forEach(function(property){-1!==value.indexOf(property)&&(value=value.replace(new RegExp(property,"g"),function(match){return prefix+match}))}),value})((function(){var args="@{arguments}";return args=args.replace(/^\[|\]$/g,"")})())`;
-  @process_opera: ~`(function(value){value=value||"all";var prefixedProperties=["transform"],prefix="-o-";return/^[-a-zA-Z0-9().\/]*,/.test(value)&&(value=value.replace(/(?:,)(?![^(]*\))/g,"")),prefixedProperties.forEach(function(property){-1!==value.indexOf(property)&&(value=value.replace(new RegExp(property,"g"),function(match){return prefix+match}))}),value})((function(){var args="@{arguments}";return args=args.replace(/^\[|\]$/g,"")})())`;
+  @process_webkit: ~`(function(value){value=value||"all";var prefixedProperties=["background-size","border-radius","border-bottom-left-radius","border-bottom-right-radius","border-top-left-radius","border-top-right-radius","box-shadow","column","transform","filter"],prefix="-webkit-";return prefixedProperties.forEach(function(property){-1!==value.indexOf(property)&&(value=value.replace(new RegExp(property,"g"),function(match){return prefix+match}))}),value})((function(){var args="@{arguments}";return args=args.replace(/^\[|\]$/g,"")})())`;
+  @process_moz: ~`(function(value){value=value||"all";var prefixedProperties=["background-size","box-shadow","column","transform","filter"],prefix="-moz-";return prefixedProperties.forEach(function(property){-1!==value.indexOf(property)&&(value=value.replace(new RegExp(property,"g"),function(match){return prefix+match}))}),value})((function(){var args="@{arguments}";return args=args.replace(/^\[|\]$/g,"")})())`;
+  @process_opera: ~`(function(value){value=value||"all";var prefixedProperties=["transform"],prefix="-o-";return prefixedProperties.forEach(function(property){-1!==value.indexOf(property)&&(value=value.replace(new RegExp(property,"g"),function(match){return prefix+match}))}),value})((function(){var args="@{arguments}";return args=args.replace(/^\[|\]$/g,"")})())`;
   @process: ~`(function(value){value=value||"all";var prefixes=["-webkit-","-moz-","-o-",""],prefixedProperties=["column","transform","filter"],subSplit=value.split(/(?:,)(?![^(]*\))/g);return subSplit.forEach(function(css,index){prefixedProperties.forEach(function(property){-1!==css.indexOf(property)&&(subSplit[index]="",prefixes.forEach(function(vendor,i){subSplit[index]+=css.trim().replace(new RegExp(property,"g"),function(match){return vendor+match}),i<prefixes.length-1&&(subSplit[index]+=",")}))})}),value=subSplit.join(",")})((function(){var args="@{arguments}";return args=args.replace(/^\[|\]$/g,"")})())`;
 
   .result (@arguments, @signal, @boolean, @local_boolean) when (@boolean = true) and (@local_boolean = true) {
diff --git a/build/lesshat.less b/build/lesshat.less
index 7e686d7..092a0ba 100644
--- a/build/lesshat.less
+++ b/build/lesshat.less
@@ -6,7 +6,7 @@
 // Handcrafted by Petr Brzek, lesshat.com
 // Works great with CSS Hat csshat.com
 
-// version: v2.0.8 (2013-11-21)
+// version: v2.0.9 (2013-11-22)
 
 // TABLE OF MIXINS:
 	// align-content
@@ -2562,9 +2562,9 @@
   @opera_local: true;
   @w3c_local: true;
 
-  @process_webkit: ~`(function(value){value=value||"all";var prefixedProperties=["background-size","border-radius","border-bottom-left-radius","border-bottom-right-radius","border-top-left-radius","border-top-right-radius","box-shadow","column","transform","filter"],prefix="-webkit-";return/^[-a-zA-Z0-9().\/]*,/.test(value)&&(value=value.replace(/(?:,)(?![^(]*\))/g,"")),prefixedProperties.forEach(function(property){-1!==value.indexOf(property)&&(value=value.replace(new RegExp(property,"g"),function(match){return prefix+match}))}),value})((function(){var args="@{arguments}";return args=args.replace(/^\[|\]$/g,"")})())`;
-  @process_moz: ~`(function(value){value=value||"all";var prefixedProperties=["background-size","box-shadow","column","transform","filter"],prefix="-moz-";return/^[-a-zA-Z0-9().\/]*,/.test(value)&&(value=value.replace(/(?:,)(?![^(]*\))/g,"")),prefixedProperties.forEach(function(property){-1!==value.indexOf(property)&&(value=value.replace(new RegExp(property,"g"),function(match){return prefix+match}))}),value})((function(){var args="@{arguments}";return args=args.replace(/^\[|\]$/g,"")})())`;
-  @process_opera: ~`(function(value){value=value||"all";var prefixedProperties=["transform"],prefix="-o-";return/^[-a-zA-Z0-9().\/]*,/.test(value)&&(value=value.replace(/(?:,)(?![^(]*\))/g,"")),prefixedProperties.forEach(function(property){-1!==value.indexOf(property)&&(value=value.replace(new RegExp(property,"g"),function(match){return prefix+match}))}),value})((function(){var args="@{arguments}";return args=args.replace(/^\[|\]$/g,"")})())`;
+  @process_webkit: ~`(function(value){value=value||"all";var prefixedProperties=["background-size","border-radius","border-bottom-left-radius","border-bottom-right-radius","border-top-left-radius","border-top-right-radius","box-shadow","column","transform","filter"],prefix="-webkit-";return prefixedProperties.forEach(function(property){-1!==value.indexOf(property)&&(value=value.replace(new RegExp(property,"g"),function(match){return prefix+match}))}),value})((function(){var args="@{arguments}";return args=args.replace(/^\[|\]$/g,"")})())`;
+  @process_moz: ~`(function(value){value=value||"all";var prefixedProperties=["background-size","box-shadow","column","transform","filter"],prefix="-moz-";return prefixedProperties.forEach(function(property){-1!==value.indexOf(property)&&(value=value.replace(new RegExp(property,"g"),function(match){return prefix+match}))}),value})((function(){var args="@{arguments}";return args=args.replace(/^\[|\]$/g,"")})())`;
+  @process_opera: ~`(function(value){value=value||"all";var prefixedProperties=["transform"],prefix="-o-";return prefixedProperties.forEach(function(property){-1!==value.indexOf(property)&&(value=value.replace(new RegExp(property,"g"),function(match){return prefix+match}))}),value})((function(){var args="@{arguments}";return args=args.replace(/^\[|\]$/g,"")})())`;
   @process: ~`(function(value){value=value||"all";var prefixes=["-webkit-","-moz-","-o-",""],prefixedProperties=["column","transform","filter"],subSplit=value.split(/(?:,)(?![^(]*\))/g);return subSplit.forEach(function(css,index){prefixedProperties.forEach(function(property){-1!==css.indexOf(property)&&(subSplit[index]="",prefixes.forEach(function(vendor,i){subSplit[index]+=css.trim().replace(new RegExp(property,"g"),function(match){return vendor+match}),i<prefixes.length-1&&(subSplit[index]+=",")}))})}),value=subSplit.join(",")})((function(){var args="@{arguments}";return args=args.replace(/^\[|\]$/g,"")})())`;
 
   .result (@arguments, @signal, @boolean, @local_boolean) when (@boolean = true) and (@local_boolean = true) {
diff --git a/mixins/box-shadow/test.js b/mixins/box-shadow/test.js
index 91fcefd..3c987df 100644
--- a/mixins/box-shadow/test.js
+++ b/mixins/box-shadow/test.js
@@ -10,6 +10,10 @@ describe('box-shadow', function() {
     test.boxShadow('5 4 100 rgba(20,20,20,0.5)', '5px 4px 100px rgba(20, 20, 20, 0.5)', done);
   });
 
+  it('should add px for numbers', function(done) {
+    test.boxShadow('5 4 100 rgba(20,20,20,0.5), inset 5 4 100 rgba(20,20,20,0.5)', '5px 4px 100px rgba(20, 20, 20, 0.5), inset 5px 4px 100px rgba(20, 20, 20, 0.5)', done);
+  });
+
   it('should return the same value', function(done) {
     test.boxShadow('0em 0.125em 0.3125em 0em rgba(0, 0, 0, 0.5)', '0em 0.125em 0.3125em 0em rgba(0, 0, 0, 0.5)', done);
   });
diff --git a/mixins/transition-property/test.js b/mixins/transition-property/test.js
index b3ff451..e9cbe12 100644
--- a/mixins/transition-property/test.js
+++ b/mixins/transition-property/test.js
@@ -10,4 +10,12 @@ describe('transition-property', function() {
     test.transitionProperty.webkit('box-shadow', '-webkit-box-shadow', done);
   });
 
+  it('should prefix property and return value', function(done) {
+    test.transitionProperty.webkit('box-shadow, transform', '-webkit-box-shadow, -webkit-transform', done);
+  });
+
+  it('should prefix property and return value', function(done) {
+    test.transitionProperty.moz('box-shadow, transform', '-moz-box-shadow, -moz-transform', done);
+  });
+
 });
diff --git a/mixins/transition-property/transition-property.js b/mixins/transition-property/transition-property.js
index 4884cd3..c8984c3 100644
--- a/mixins/transition-property/transition-property.js
+++ b/mixins/transition-property/transition-property.js
@@ -35,10 +35,6 @@ transitionProperty.webkit = function transitionProperty(value) {
   var prefixedProperties = ['background-size', 'border-radius', 'border-bottom-left-radius', 'border-bottom-right-radius', 'border-top-left-radius', 'border-top-right-radius', 'box-shadow', 'column', 'transform', 'filter'];
   var prefix = '-webkit-';
 
-  if (/^[-a-zA-Z0-9().\/]*,/.test(value)) {
-    value = value.replace(/(?:,)(?![^(]*\))/g, '');
-  }
-
   prefixedProperties.forEach(function(property, index) {
     if (value.indexOf(property) !== -1) {
       value = value.replace(new RegExp(property, 'g'), function(match) {
@@ -55,10 +51,6 @@ transitionProperty.moz = function transitionProperty(value) {
   var prefixedProperties = ['background-size', 'box-shadow', 'column', 'transform', 'filter'];
   var prefix = '-moz-';
 
-  if (/^[-a-zA-Z0-9().\/]*,/.test(value)) {
-    value = value.replace(/(?:,)(?![^(]*\))/g, '');
-  }
-
   prefixedProperties.forEach(function(property, index) {
     if (value.indexOf(property) !== -1) {
       value = value.replace(new RegExp(property, 'g'), function(match) {
@@ -75,10 +67,6 @@ transitionProperty.opera = function transitionProperty(value) {
   var prefixedProperties = ['transform'];
   var prefix = '-o-';
 
-  if (/^[-a-zA-Z0-9().\/]*,/.test(value)) {
-    value = value.replace(/(?:,)(?![^(]*\))/g, '');
-  }
-
   prefixedProperties.forEach(function(property, index) {
     if (value.indexOf(property) !== -1) {
       value = value.replace(new RegExp(property, 'g'), function(match) {
diff --git a/mixins/transition-property/transition-property.md b/mixins/transition-property/transition-property.md
index 896e23d..91798a6 100644
--- a/mixins/transition-property/transition-property.md
+++ b/mixins/transition-property/transition-property.md
@@ -13,7 +13,19 @@ Resources: **[WebPlatform](http://docs.webplatform.org/wiki/css/properties/trans
 
 **Tips and tricks:**
 
-  And also properties inside `transition-property` definition are automatically prefixed, if it is needed.
+  And also properties inside `transition-property` definition are automatically prefixed, if it is needed.  
+  **W3C property value is appending all prefixed values.**  
+  Why? Some browsers support W3C unprefixed property, but value must be sometimes prefixed.
+  Let's consider this example:
+
+    div {
+    -webkit-transition: -webkit-filter .3s ease;
+    -moz-transition: -moz-filter .3s ease;
+    -o-transition: filter .3s ease;
+
+    // There is a problem! Webkit needs -webkit-filter property
+    transition: filter .3s ease;
+    }
 
 **Example:**
 
@@ -23,10 +35,10 @@ Resources: **[WebPlatform](http://docs.webplatform.org/wiki/css/properties/trans
     
     // Result
     div {
-     -webkit-transition-property: -webkit-box-shadow;
-     -moz-transition-property: -moz-box-shadow;
-     -o-transition-property: box-shadow;
-     transition-property: box-shadow;
+     -webkit-transition-property: -webkit-transform;
+     -moz-transition-property: -moz-transform;
+     -o-transition-property: -o-transform;
+     transition-property: -webkit-transform,-moz-transform,-o-transform,transform;
     }
 
 
diff --git a/mixins/transition/transition.md b/mixins/transition/transition.md
index 5b5b816..b4979fb 100644
--- a/mixins/transition/transition.md
+++ b/mixins/transition/transition.md
@@ -21,7 +21,19 @@ Resources: **[WebPlatform](http://docs.webplatform.org/wiki/css/properties/trans
           time += 's';
         }
 
-  And also properties inside `transition` definition are automatically prefixed, if it is needed.
+  And also properties inside `transition` definition are automatically prefixed, if it is needed.  
+  **W3C property value is appending all prefixed values.**  
+  Why? Some browsers support W3C unprefixed property, but value must be sometimes prefixed.
+  Let's consider this example:
+
+    div {
+    -webkit-transition: -webkit-filter .3s ease;
+    -moz-transition: -moz-filter .3s ease;
+    -o-transition: filter .3s ease;
+
+    // There is a problem! Webkit needs -webkit-filter property
+    transition: filter .3s ease;
+    }
 
 **Example:**
 
diff --git a/package.json b/package.json
index 8fa73ca..8723c22 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "lesshat",
   "description": "Most advanced LESS CSS mixins library",
-  "version": "2.0.8",
+  "version": "2.0.9",
   "homepage": "http://lesshat.com/",
   "author": {
     "name": "Petr Brzek",