diff --git a/lib/compass/sass_extensions/sprites.rb b/lib/compass/sass_extensions/sprites.rb
index 48e2d959..faf6afec 100644
--- a/lib/compass/sass_extensions/sprites.rb
+++ b/lib/compass/sass_extensions/sprites.rb
@@ -6,6 +6,7 @@ require 'compass/sass_extensions/sprites/image_helper'
 #classes
 require 'compass/sass_extensions/sprites/sprite_map'
 require 'compass/sass_extensions/sprites/image'
+require 'compass/sass_extensions/sprites/row_fitter'
 require 'compass/sass_extensions/sprites/image_row'
 require 'compass/sass_extensions/sprites/base'
 require 'compass/sass_extensions/sprites/engines'
diff --git a/lib/compass/sass_extensions/sprites/processing.rb b/lib/compass/sass_extensions/sprites/processing.rb
index 68b64160..cd371ba7 100644
--- a/lib/compass/sass_extensions/sprites/processing.rb
+++ b/lib/compass/sass_extensions/sprites/processing.rb
@@ -4,7 +4,6 @@ module Compass
       module Processing
         def smart_packing
           fitter = ::Compass::SassExtensions::Sprites::RowFitter.new(@images)
-
           current_y = 0
           fitter.fit!.each do |row|
             current_x = 0
@@ -12,10 +11,9 @@ module Compass
               image.left = current_x
               image.top = current_y
               current_x += image.width
-              image.left = image.position.unit_str == "%" ? (@width - image.width) * (image.position.value / 100) : image.position.value
             end
             current_y += row.height
-          end
+          end          
         end
         
         
diff --git a/test/integrations/sprites_test.rb b/test/integrations/sprites_test.rb
index 23a45996..ccdf32cf 100644
--- a/test/integrations/sprites_test.rb
+++ b/test/integrations/sprites_test.rb
@@ -604,4 +604,37 @@ class SpritesTest < Test::Unit::TestCase
     CSS
   end
 
-end
\ No newline at end of file
+  it "should generate a sprite using smart packing" do
+    css = render <<-SCSS
+      $image_row-smart-pack: true;
+      @import "image_row/*.png";
+      @include all-image_row-sprites;
+    SCSS
+    assert_correct css, <<-CSS
+      .image_row-sprite, .image_row-large, .image_row-large_square, .image_row-medium, .image_row-small, .image_row-tall {
+        background: url('/image_row-7738758b32.png') no-repeat;
+      }
+      
+      .image_row-large {
+        background-position: 0 0;
+      }
+      
+      .image_row-large_square {
+        background-position: -100px -20px;
+      }
+      
+      .image_row-medium {
+        background-position: 0 -20px;
+      }
+      
+      .image_row-small {
+        background-position: -140px -20px;
+      }
+      
+      .image_row-tall {
+        background-position: -160px -20px;
+      }
+    CSS
+  end
+
+end