diff --git a/doc-src/content/CHANGELOG.markdown b/doc-src/content/CHANGELOG.markdown
index dae64eab..588b699b 100644
--- a/doc-src/content/CHANGELOG.markdown
+++ b/doc-src/content/CHANGELOG.markdown
@@ -19,6 +19,9 @@ The Documentation for the [latest preview release](http://beta.compass-style.org
 
 **Note:** Due to some internal changes to compass you may have issue with your sass cache. Run `compass clean` to clear your cache.
 
+* The `pie-clearfix` mixin has been updated. If you have to
+  support Firefox < 3.5, please update your stylesheets
+  to use `legacy-pie-clearfix` instead.
 * Added a new command: `compass clean` which removes any generated
   css files and clears the sass cache.
 * Enable IE 10 support for flexible box with the -ms prefix.
@@ -32,7 +35,7 @@ The Documentation for the [latest preview release](http://beta.compass-style.org
 * Numerous small bug fixes to sprites.
 * Sprite Engines are now classes see [Docs](/help/tutorials/extending) for more information
 * Sprite classes have bee re-factored into modules for readability
-* Sprites will no longer cause `undefined method 'find' for #<Compass::SpriteMap` when adding or removing sprite files
+* Sprites will no longer cause `undefined method 'find' for #<Compass::SpriteMap>` when adding or removing sprite files
 
 0.11.2 (06/10/2011)
 -------------------
diff --git a/frameworks/compass/stylesheets/compass/utilities/general/_clearfix.scss b/frameworks/compass/stylesheets/compass/utilities/general/_clearfix.scss
index 2959e5ae..73f9254c 100644
--- a/frameworks/compass/stylesheets/compass/utilities/general/_clearfix.scss
+++ b/frameworks/compass/stylesheets/compass/utilities/general/_clearfix.scss
@@ -18,7 +18,7 @@
 // [Easy Clearing](http://www.positioniseverything.net/easyclearing.html)
 // has the advantage of allowing positioned elements to hang
 // outside the bounds of the container at the expense of more tricky CSS.
-@mixin pie-clearfix {
+@mixin legacy-pie-clearfix {
   &:after {
     content    : "\0020";
     display    : block;
@@ -30,14 +30,14 @@
   @include has-layout;
 }
 
-// An update to the PIE clearfix method that reduces the amount of CSS required
-// [A new micro clearfix hack](http://nicolasgallagher.com/micro-clearfix-hack/) (25 April 2011)
-@mixin micro-clearfix {
-  &:before, &:after {
+// This is an updated version of the PIE clearfix method that reduces the amount of CSS output.
+// If you need to support Firefox before 3.5 you need to use `legacy-pie-clearfix` instead.
+//
+// Adapted from: [A new micro clearfix hack](http://nicolasgallagher.com/micro-clearfix-hack/)
+@mixin pie-clearfix {
+  &:after {
     content: "";
     display: table;
-  }
-  &:after {
     clear: both;
   }
   @include has-layout;
diff --git a/lib/compass/compiler.rb b/lib/compass/compiler.rb
index 606f9406..fe00ef66 100644
--- a/lib/compass/compiler.rb
+++ b/lib/compass/compiler.rb
@@ -84,7 +84,7 @@ module Compass
     def run
       if new_config?
         # Wipe out the cache and force compilation if the configuration has changed.
-        FileUtils.rm_rf options[:cache_location]
+        remove options[:cache_location]
         options[:force] = true
       end
 
diff --git a/test/fixtures/stylesheets/compass/css/legacy_clearfix.css b/test/fixtures/stylesheets/compass/css/legacy_clearfix.css
index 2a287628..54086726 100644
--- a/test/fixtures/stylesheets/compass/css/legacy_clearfix.css
+++ b/test/fixtures/stylesheets/compass/css/legacy_clearfix.css
@@ -15,3 +15,12 @@
     visibility: hidden; }
   .pie-clearfix {
     display: block; }
+
+.simplified-pie-clearfix {
+  display: inline-block; }
+  .simplified-pie-clearfix:after {
+    content: "";
+    display: table;
+    clear: both; }
+  .simplified-pie-clearfix {
+    display: block; }
diff --git a/test/fixtures/stylesheets/compass/css/utilities.css b/test/fixtures/stylesheets/compass/css/utilities.css
index 354c84dc..8a6c64b1 100644
--- a/test/fixtures/stylesheets/compass/css/utilities.css
+++ b/test/fixtures/stylesheets/compass/css/utilities.css
@@ -12,6 +12,13 @@
     overflow: hidden;
     visibility: hidden; }
 
+.simple-pie-clearfix {
+  *zoom: 1; }
+  .simple-pie-clearfix:after {
+    content: "";
+    display: table;
+    clear: both; }
+
 p.light {
   background-color: #b0201e;
   color: black; }
diff --git a/test/fixtures/stylesheets/compass/sass/legacy_clearfix.scss b/test/fixtures/stylesheets/compass/sass/legacy_clearfix.scss
index 5a9f6396..906e49b1 100644
--- a/test/fixtures/stylesheets/compass/sass/legacy_clearfix.scss
+++ b/test/fixtures/stylesheets/compass/sass/legacy_clearfix.scss
@@ -7,5 +7,8 @@ $default-has-layout-approach: block;
 }
 
 .pie-clearfix {
+    @include legacy-pie-clearfix;
+}
+.simplified-pie-clearfix {
     @include pie-clearfix;
 }
diff --git a/test/fixtures/stylesheets/compass/sass/utilities.scss b/test/fixtures/stylesheets/compass/sass/utilities.scss
index 7daac2f6..d579a6ca 100644
--- a/test/fixtures/stylesheets/compass/sass/utilities.scss
+++ b/test/fixtures/stylesheets/compass/sass/utilities.scss
@@ -5,7 +5,10 @@
 }
 
 .pie-clearfix {
-    @include pie-clearfix;
+    @include legacy-pie-clearfix;
+}
+.simple-pie-clearfix {
+  @include pie-clearfix;
 }
 
 p.light { @include contrasted(#B0201E); }