diff --git a/asset_id.gemspec b/asset_id.gemspec
index 601c82f..6229826 100644
--- a/asset_id.gemspec
+++ b/asset_id.gemspec
@@ -10,7 +10,6 @@ Gem::Specification.new do |s|
   s.description = %q{asset_id is a library for uploading static assets to Amazon S3.}
   s.email = %q{moomerman@gmail.com}
   s.files = ["LICENSE", "README.textile","lib/asset_id.rb"] + Dir.glob('lib/asset_id/*.rb') + Dir.glob('lib/asset_id/backend/*.rb')
-  s.has_rdoc = false
   s.homepage = %q{http://github.com/moomerman/asset_id}
   s.rdoc_options = ["--inline-source", "--charset=UTF-8"]
   s.require_paths = ["lib"]
diff --git a/lib/asset_id/backend/s3.rb b/lib/asset_id/backend/s3.rb
index 947b8a9..b90ddc1 100644
--- a/lib/asset_id/backend/s3.rb
+++ b/lib/asset_id/backend/s3.rb
@@ -47,6 +47,9 @@ def self.upload(options={})
           :access => s3_permissions,
         }.merge(asset.cache_headers)
         
+        #load css md5 before replace_css_images
+        asset.md5
+
         asset.replace_css_images!(:prefix => s3_prefix) if asset.css?
         
         if asset.gzip_type?
@@ -74,4 +77,4 @@ def self.upload(options={})
     end
   
   end
-end
\ No newline at end of file
+end
diff --git a/lib/asset_id/cache.rb b/lib/asset_id/cache.rb
index ac96fe1..8275ff4 100644
--- a/lib/asset_id/cache.rb
+++ b/lib/asset_id/cache.rb
@@ -8,7 +8,7 @@ def self.empty
     end
     
     def self.cache
-      @cache ||= YAML.load_file(cache_path) rescue {}
+      @cache ||= (YAML.load_file(cache_path) rescue {})
     end
     
     def self.cache_path
@@ -20,6 +20,7 @@ def self.get(asset)
     end
     
     def self.hit?(asset)
+      return false if asset.css?
       return true if cache[asset.relative_path] and cache[asset.relative_path][:fingerprint] == asset.fingerprint
       cache[asset.relative_path] = {:expires => asset.expiry_date.to_s, :fingerprint => asset.fingerprint}
       false
@@ -34,4 +35,4 @@ def self.save!
     end
   
   end
-end
\ No newline at end of file
+end
diff --git a/test/asset_test.rb b/test/asset_test.rb
index 8c502d5..4c929cf 100644
--- a/test/asset_test.rb
+++ b/test/asset_test.rb
@@ -50,6 +50,12 @@ def test_parse_css_with_prefix
     asset.replace_css_images!(:prefix => 'https://example.com')
     assert_equal 'body { background: url(https://example.com/images/thundercats-id-982f2a3a4d905189959e848badb4f55b.jpg); }', asset.data
   end
+
+  def test_cache_hit
+    assert !AssetID::Cache.hit?(@asset)
+    assert AssetID::Cache.hit?(@asset)
+  end
+
   
 end
 
@@ -57,4 +63,4 @@ class Rails
   def self.root
     File.expand_path(File.join(File.dirname(__FILE__), 'sandbox'))
   end
-end
\ No newline at end of file
+end