diff --git a/middleman-core/lib/middleman-core/cli/build.rb b/middleman-core/lib/middleman-core/cli/build.rb
index e4ab33b8..04153db2 100644
--- a/middleman-core/lib/middleman-core/cli/build.rb
+++ b/middleman-core/lib/middleman-core/cli/build.rb
@@ -98,10 +98,10 @@ module Middleman::Cli
     # Render a page to a file.
     #
     # @param [Middleman::Sitemap::Page] page
-    # @return [void]
+    # @return [String] The full path of the file that was written
     def render_to_file(page)
       build_dir = self.class.shared_instance.build_dir
-      output_file = File.join(self.class.shared_instance.build_dir, page.destination_path)
+      output_file = File.join(build_dir, page.destination_path)
 
       begin
         response = self.class.shared_rack.get(page.request_path.gsub(/\s/, "%20"))
@@ -114,6 +114,8 @@ module Middleman::Cli
         say_status :error, output_file, :red
         raise Thor::Error.new $!
       end
+
+      output_file
     end
   end
   
@@ -219,9 +221,8 @@ module Middleman::Cli
         next if page.ignored?
         next if @config[:glob] && !File.fnmatch(@config[:glob], page.path)
 
-        base.render_to_file(page)
+        output_path = base.render_to_file(page)
 
-        output_path = File.join(@destination, page.destination_path)
         @cleaning_queue.delete(Pathname.new(output_path).realpath) if cleaning?
       end
     end
diff --git a/middleman-core/lib/middleman-core/sitemap/page.rb b/middleman-core/lib/middleman-core/sitemap/page.rb
index e2470716..99d1a2d0 100644
--- a/middleman-core/lib/middleman-core/sitemap/page.rb
+++ b/middleman-core/lib/middleman-core/sitemap/page.rb
@@ -116,15 +116,17 @@ module Middleman::Sitemap
     # Render this page
     # @return [String]
     def render(*args, &block)
-      return unless template?
-      
-      if proxy?
-        t = store.page(proxied_to).template
-        t.request_path = path
-        t.render(*args)
-      else
-        template.request_path = path
-        template.render(*args, &block)
+      if template?
+        if proxy?
+          t = store.page(proxied_to).template
+          t.request_path = path
+          t.render(*args)
+        else
+          template.request_path = path
+          template.render(*args, &block)
+        end
+      else # just a static file
+        File.open(source_file).read
       end
     end
     
@@ -167,9 +169,7 @@ module Middleman::Sitemap
     # This path can be affected by proxy callbacks.
     # @return [String]
     def destination_path
-      # memoizing this means that reroute callbacks should be in place before the sitemap
-      # gets built
-      @destination_path ||= store.reroute_callbacks.inject(self.path) do |destination, callback|
+      store.reroute_callbacks.inject(self.path) do |destination, callback|
         callback.call(destination, self)
       end
     end
@@ -256,7 +256,7 @@ module Middleman::Sitemap
     # Clear the cache if the file is deleted
     # @return [void]
     def delete
-      cache.clear
+      touch
     end
     
   protected
diff --git a/middleman-core/lib/middleman-core/sitemap/store.rb b/middleman-core/lib/middleman-core/sitemap/store.rb
index f6f43fb0..7bc83f65 100644
--- a/middleman-core/lib/middleman-core/sitemap/store.rb
+++ b/middleman-core/lib/middleman-core/sitemap/store.rb
@@ -94,7 +94,6 @@ module Middleman::Sitemap
     # @param [String] The destination (output) path of a page.
     # @return [Middleman::Sitemap::Page]
     def page_by_destination(destination_path)
-      # TODO: memoize this
       destination_path = normalize_path(destination_path)
       pages.find do |p|
         p.destination_path == destination_path ||
diff --git a/middleman-more/features/asset_hash.feature b/middleman-more/features/asset_hash.feature
index ec4938be..856693ef 100644
--- a/middleman-more/features/asset_hash.feature
+++ b/middleman-more/features/asset_hash.feature
@@ -7,8 +7,8 @@ Feature: Assets get a file hash appended to their and references to them are upd
       | images/100px-1242c368.png |
       | images/100px-5fd6fb90.jpg |
       | images/100px-5fd6fb90.gif |
-      | javascripts/application-1d8d5276.js |
-      | stylesheets/site-8c28fde3.css |
+      | javascripts/application-570e5d45.js |
+      | stylesheets/site-d9d84711.css |
       | index.html |
       | subdir/index.html |
       | other/index.html |
@@ -19,48 +19,66 @@ Feature: Assets get a file hash appended to their and references to them are upd
       | javascripts/application.js |
       | stylesheets/site.css |
       
-    And the file "javascripts/application-1d8d5276.js" should contain "img.src = '/images/100px-5fd6fb90.jpg'"
-    And the file "stylesheets/site-8c28fde3.css" should contain "background-image: url('../images/100px-5fd6fb90.jpg')"
-    And the file "index.html" should contain 'href="stylesheets/site-8c28fde3.css"'
-    And the file "index.html" should contain 'src="javascripts/application-1d8d5276.js"'
+    And the file "javascripts/application-570e5d45.js" should contain "img.src = '/images/100px-5fd6fb90.jpg'"
+    And the file "stylesheets/site-d9d84711.css" should contain "background-image: url('../images/100px-5fd6fb90.jpg')"
+    And the file "index.html" should contain 'href="stylesheets/site-d9d84711.css"'
+    And the file "index.html" should contain 'src="javascripts/application-570e5d45.js"'
     And the file "index.html" should contain 'src="images/100px-5fd6fb90.jpg"'
-    And the file "subdir/index.html" should contain 'href="../stylesheets/site-8c28fde3.css"'
-    And the file "subdir/index.html" should contain 'src="../javascripts/application-1d8d5276.js"'
+    And the file "subdir/index.html" should contain 'href="../stylesheets/site-d9d84711.css"'
+    And the file "subdir/index.html" should contain 'src="../javascripts/application-570e5d45.js"'
     And the file "subdir/index.html" should contain 'src="../images/100px-5fd6fb90.jpg"'
-    And the file "other/index.html" should contain 'href="../stylesheets/site-8c28fde3.css"'
-    And the file "other/index.html" should contain 'src="../javascripts/application-1d8d5276.js"'
+    And the file "other/index.html" should contain 'href="../stylesheets/site-d9d84711.css"'
+    And the file "other/index.html" should contain 'src="../javascripts/application-570e5d45.js"'
     And the file "other/index.html" should contain 'src="../images/100px-5fd6fb90.jpg"'
     
   Scenario: Hashed assets work in preview server
     Given the Server is running at "asset-hash-app"
     When I go to "/"
-    Then I should see 'href="stylesheets/site-8c28fde3.css"'
-    And I should see 'src="javascripts/application-1d8d5276.js"'
+    Then I should see 'href="stylesheets/site-d9d84711.css"'
+    And I should see 'src="javascripts/application-570e5d45.js"'
     And I should see 'src="images/100px-5fd6fb90.jpg"'
     When I go to "/subdir/"
-    Then I should see 'href="../stylesheets/site-8c28fde3.css"'
-    And I should see 'src="../javascripts/application-1d8d5276.js"'
+    Then I should see 'href="../stylesheets/site-d9d84711.css"'
+    And I should see 'src="../javascripts/application-570e5d45.js"'
     And I should see 'src="../images/100px-5fd6fb90.jpg"'
     When I go to "/other/"
-    Then I should see 'href="../stylesheets/site-8c28fde3.css"'
-    And I should see 'src="../javascripts/application-1d8d5276.js"'
+    Then I should see 'href="../stylesheets/site-d9d84711.css"'
+    And I should see 'src="../javascripts/application-570e5d45.js"'
     And I should see 'src="../images/100px-5fd6fb90.jpg"'
-    When I go to "/javascripts/application-1d8d5276.js"
+    When I go to "/javascripts/application-570e5d45.js"
     Then I should see "img.src = '/images/100px-5fd6fb90.jpg'"
-    When I go to "/stylesheets/site-8c28fde3.css"
+    When I go to "/stylesheets/site-d9d84711.css"
     Then I should see "background-image: url('../images/100px-5fd6fb90.jpg')"
 
   Scenario: Enabling an asset host still produces hashed files and references  
     Given the Server is running at "asset-hash-host-app"
     When I go to "/"
-    Then I should see 'href="http://middlemanapp.com/stylesheets/site-8c28fde3.css"'
+    Then I should see 'href="http://middlemanapp.com/stylesheets/site-0ac82771.css"'
     And I should see 'src="http://middlemanapp.com/images/100px-5fd6fb90.jpg"'
     When I go to "/subdir/"
-    Then I should see 'href="http://middlemanapp.com/stylesheets/site-8c28fde3.css"'
+    Then I should see 'href="http://middlemanapp.com/stylesheets/site-0ac82771.css"'
     And I should see 'src="http://middlemanapp.com/images/100px-5fd6fb90.jpg"'
     When I go to "/other/"
-    Then I should see 'href="http://middlemanapp.com/stylesheets/site-8c28fde3.css"'
+    Then I should see 'href="http://middlemanapp.com/stylesheets/site-0ac82771.css"'
     And I should see 'src="http://middlemanapp.com/images/100px-5fd6fb90.jpg"'
     # Asset helpers don't appear to work from Compass right now
-    # When I go to "/stylesheets/site-8c28fde3.css"
-    # Then I should see "background-image: url('http://middlemanapp.com/images/100px-5fd6fb90.jpg')"
\ No newline at end of file
+    # When I go to "/stylesheets/site-0ac82771.css"
+    # Then I should see "background-image: url('http://middlemanapp.com/images/100px-5fd6fb90.jpg')"
+
+  Scenario: The asset hash should change when a SASS or Sprockets partial changes
+    Given the Server is running at "asset-hash-app"
+    And the file "source/stylesheets/_partial.sass" has the contents
+      """
+      body
+        font-size: 14px
+      """
+    When I go to "/partials/"
+    Then I should see 'href="../stylesheets/uses_partials-e81dd9b4.css'
+    And the file "source/stylesheets/_partial.sass" has the contents
+      """
+      body
+        font-size: 18px !important
+      """
+    When I go to "/partials/"
+    Then I should see 'href="../stylesheets/uses_partials-ba3ef309.css'
+    
diff --git a/middleman-more/fixtures/asset-hash-app/source/partials.html.erb b/middleman-more/fixtures/asset-hash-app/source/partials.html.erb
new file mode 100644
index 00000000..6b5aa4bf
--- /dev/null
+++ b/middleman-more/fixtures/asset-hash-app/source/partials.html.erb
@@ -0,0 +1 @@
+<%= stylesheet_link_tag 'uses_partials' %>
diff --git a/middleman-more/fixtures/asset-hash-app/source/stylesheets/_partial.sass b/middleman-more/fixtures/asset-hash-app/source/stylesheets/_partial.sass
new file mode 100644
index 00000000..3b0e67db
--- /dev/null
+++ b/middleman-more/fixtures/asset-hash-app/source/stylesheets/_partial.sass
@@ -0,0 +1,2 @@
+body
+  font-size: 18px
\ No newline at end of file
diff --git a/middleman-more/fixtures/asset-hash-app/source/stylesheets/uses_partials.css.sass b/middleman-more/fixtures/asset-hash-app/source/stylesheets/uses_partials.css.sass
new file mode 100644
index 00000000..66b4dfd6
--- /dev/null
+++ b/middleman-more/fixtures/asset-hash-app/source/stylesheets/uses_partials.css.sass
@@ -0,0 +1,4 @@
+@import partial.sass
+
+red
+  color: blue
\ No newline at end of file
diff --git a/middleman-more/lib/middleman-more/core_extensions/sprockets.rb b/middleman-more/lib/middleman-more/core_extensions/sprockets.rb
index c0f1c996..70ed3371 100644
--- a/middleman-more/lib/middleman-more/core_extensions/sprockets.rb
+++ b/middleman-more/lib/middleman-more/core_extensions/sprockets.rb
@@ -13,44 +13,51 @@ module Middleman::CoreExtensions::Sprockets
       app.set :js_compressor, false
       app.set :css_compressor, false
 
+      # Add class methods to context
+      app.send :include, InstanceMethods
+
       # Once Middleman is setup
       app.ready do
-        # Create sprockets env for JS and CSS
-        js_env = Middleman::CoreExtensions::Sprockets::JavascriptEnvironment.new(self)
-        css_env = Middleman::CoreExtensions::Sprockets::StylesheetEnvironment.new(self)
-
         # Add any gems with (vendor|app|.)/assets/javascripts to paths
         # also add similar directories from project root (like in rails)
         root_paths = [%w{ app }, %w{ assets }, %w{ vendor }, %w{ app assets }, %w{ vendor assets }]
-        try_js_paths  = root_paths.map{|rp| File.join(rp, 'javascripts')}
-        try_css_paths = root_paths.map{|rp| File.join(rp, 'stylesheets')}
+        try_paths  = root_paths.map {|rp| File.join(rp, 'javascripts') } +
+                     root_paths.map {|rp| File.join(rp, 'stylesheets') }
 
-        { try_js_paths => js_env, try_css_paths => css_env }.each do |paths, env|
-          ([root] + ::Middleman.rubygems_latest_specs.map(&:full_gem_path)).each do |root_path|
-            paths.map{|p| File.join(root_path, p)}.
-              select{|p| File.directory?(p)}.
-              each{|path| env.append_path(path)}
-          end
+        ([root] + ::Middleman.rubygems_latest_specs.map(&:full_gem_path)).each do |root_path|
+          try_paths.map {|p| File.join(root_path, p) }.
+            select {|p| File.directory?(p) }.
+            each {|path| sprockets.append_path(path) }
         end
 
         # Setup Sprockets Sass options
         sass.each { |k, v| ::Sprockets::Sass.options[k] = v }
 
         # Intercept requests to /javascripts and /stylesheets and pass to sprockets
-        map("/#{js_dir}") { run js_env }
-        map("/#{css_dir}"){ run css_env }
+        our_sprockets = sprockets
+        map("/#{js_dir}")  { run our_sprockets }
+        map("/#{css_dir}") { run our_sprockets }
       end
     end
     alias :included :registered
   end
 
+  module InstanceMethods
+    # @return [Middleman::CoreExtensions::Sprockets::MiddlemanSprocketsEnvironment]
+    def sprockets
+      @sprockets ||= MiddlemanSprocketsEnvironment.new(self)
+    end
+  end
+
   # Generic Middleman Sprockets env
-  class MiddlemanEnvironment < ::Sprockets::Environment
+  class MiddlemanSprocketsEnvironment < ::Sprockets::Environment
     # Setup
     def initialize(app)
       @app = app
       super app.source_dir
 
+      digest = Digest::SHA1
+
       # Make the app context available to Sprockets
       context_class.send(:define_method, :app) { app }
       context_class.class_eval do
@@ -62,26 +69,10 @@ module Middleman::CoreExtensions::Sprockets
           end
         end
       end
-    end
 
-    # During development, don't use the asset cache
-    def find_asset(path, options = {})
-      expire_index! if @app.development?
-      super
-    end
-  end
-
-  # Javascript specific environment
-  class JavascriptEnvironment < MiddlemanEnvironment
-
-    # Init
-    def initialize(app)
-      super
-
-      expire_index!
-
-      # Remove old compressor
+      # Remove old compressors
       unregister_bundle_processor 'application/javascript', :js_compressor
+      unregister_bundle_processor 'text/css', :css_compressor
 
       # Register compressor from config
       register_bundle_processor 'application/javascript', :js_compressor do |context, data|
@@ -92,29 +83,6 @@ module Middleman::CoreExtensions::Sprockets
         end
       end if app.js_compressor
 
-      # configure search paths
-      append_path app.js_dir
-    end
-
-    # Clear cache on error
-    def javascript_exception_response(exception)
-      expire_index!
-      super(exception)
-    end
-  end
-
-  # CSS specific environment
-  class StylesheetEnvironment < MiddlemanEnvironment
-
-    # Init
-    def initialize(app)
-      super
-
-      expire_index!
-
-      # Remove old compressor
-      unregister_bundle_processor 'text/css', :css_compressor
-
       # Register compressor from config
       register_bundle_processor 'text/css', :css_compressor do |context, data|
         if context.pathname.to_s =~ /\.min\./
@@ -125,13 +93,23 @@ module Middleman::CoreExtensions::Sprockets
       end if app.css_compressor
 
       # configure search paths
+      append_path app.js_dir
       append_path app.css_dir
     end
 
+    # During development, don't use the asset cache
+    def find_asset(path, options = {})
+      expire_index! if @app.development?
+      super
+    end
+
     # Clear cache on error
-    def css_exception_response(exception)
+    def javascript_exception_response(exception)
       expire_index!
       super(exception)
     end
+
+    # Clear cache on error
+    alias :css_exception_response :javascript_exception_response
   end
 end
diff --git a/middleman-more/lib/middleman-more/extensions/asset_hash.rb b/middleman-more/lib/middleman-more/extensions/asset_hash.rb
index 3461fc36..f0f3011b 100755
--- a/middleman-more/lib/middleman-more/extensions/asset_hash.rb
+++ b/middleman-more/lib/middleman-more/extensions/asset_hash.rb
@@ -8,10 +8,25 @@ module Middleman::Extensions
         app.after_configuration do
           sitemap.reroute do |destination, page|
             if exts.include? page.ext
-              page.cache.fetch(:asset_hash) do
-                digest    = Digest::SHA1.file(page.source_file).hexdigest[0..7]
-                destination.sub(/\.(\w+)$/) { |ext| "-#{digest}#{ext}" }
+              # figure out the path Sprockets would use for this asset
+              if page.ext == '.js'
+                sprockets_path = page.path.sub(js_dir,'').sub(/^\//,'')
+              elsif page.ext == '.css'
+                sprockets_path = page.path.sub(css_dir,'').sub(/^\//,'')
               end
+
+              # See if Sprockets knows about the file
+              asset = sprockets.find_asset(sprockets_path) if sprockets_path
+
+              if asset # if it's a Sprockets asset, ask sprockets for its digest
+                digest = asset.digest[0..7]
+              elsif page.template? # if it's a template, render it out
+                digest = Digest::SHA1.hexdigest(page.render)[0..7]
+              else # if it's a static file, just hash it
+                digest = Digest::SHA1.file(page.source_file).hexdigest[0..7]
+              end
+
+              destination.sub(/\.(\w+)$/) { |ext| "-#{digest}#{ext}" }
             else
               destination
             end