NameError in Dashboard#index

Showing /Users/kain/Sites/xxx/app/views/layouts/application.html.erb where line #7 raised:

uninitialized constant ActionView::Base::CONTROLLER_CLASS
Extracted source (around line #7):

4: <head>
5:   <meta http-equiv="Content-type" content="text/html; charset=utf-8" />
6: 
7:   <%= stylesheet_link_tag "960/reset.css", :media => "screen" %>
8:   <%= stylesheet_link_tag "960/960.css", :media => "screen" %>
9:   <%# stylesheet_link_tag "960/text.css", :media => "screen" %>
10: 
RAILS_ROOT: /Users/kain/Sites/xxx

Application Trace | Framework Trace | Full Trace
/Users/kain/Sites/xxx/vendor/rails/activesupport/lib/active_support/dependencies.rb:116:in `const_missing'
/Users/kain/Sites/xxx/vendor/rails/actionpack/lib/action_view/base.rb:243:in `name'
/Users/kain/Sites/xxx/vendor/rails/activesupport/lib/active_support/configurable.rb:9:in `get_config'
/Users/kain/Sites/xxx/vendor/rails/activesupport/lib/active_support/configurable.rb:19:in `config'
/Users/kain/Sites/xxx/vendor/rails/activesupport/lib/active_support/configurable.rb:32:in `config'
/Users/kain/Sites/xxx/vendor/rails/actionpack/lib/action_view/helpers/asset_tag_helper.rb:707:in `rails_asset_id'
/Users/kain/Sites/xxx/vendor/rails/actionpack/lib/action_view/helpers/asset_tag_helper.rb:724:in `rewrite_asset_path'
/Users/kain/Sites/xxx/vendor/rails/actionpack/lib/action_view/helpers/asset_tag_helper.rb:648:in `compute_public_path'
/Users/kain/Sites/xxx/vendor/rails/actionpack/lib/action_view/helpers/asset_tag_helper.rb:358:in `path_to_stylesheet'
/Users/kain/Sites/xxx/vendor/rails/actionpack/lib/action_view/helpers/asset_tag_helper.rb:737:in `stylesheet_tag'
/Users/kain/Sites/xxx/vendor/rails/actionpack/lib/action_view/helpers/asset_tag_helper.rb:447:in `stylesheet_link_tag'
/Users/kain/Sites/xxx/vendor/rails/actionpack/lib/action_view/helpers/asset_tag_helper.rb:447:in `collect'
/Users/kain/Sites/xxx/vendor/rails/actionpack/lib/action_view/helpers/asset_tag_helper.rb:447:in `stylesheet_link_tag'
/Users/kain/Sites/xxx/app/views/layouts/application.html.erb:7:in `_render_template__894105810_2172432420_0'
/Library/Ruby/Gems/1.8/gems/rack-1.0.0/lib/rack/head.rb:9:in `call'
/Library/Ruby/Gems/1.8/gems/rack-1.0.0/lib/rack/methodoverride.rb:24:in `call'
/Library/Ruby/Gems/1.8/gems/rack-1.0.0/lib/rack/lock.rb:11:in `call'
/Library/Ruby/Gems/1.8/gems/rack-1.0.0/lib/rack/lock.rb:11:in `synchronize'
/Library/Ruby/Gems/1.8/gems/rack-1.0.0/lib/rack/lock.rb:11:in `call'
/Library/Ruby/Gems/1.8/gems/rack-1.0.0/lib/rack/content_length.rb:13:in `call'
/Library/Ruby/Gems/1.8/gems/rack-1.0.0/lib/rack/chunked.rb:15:in `call'
/Library/Ruby/Gems/1.8/gems/rack-1.0.0/lib/rack/handler/mongrel.rb:61:in `process'
/Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:159:in `process_client'
/Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:158:in `each'
/Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:158:in `process_client'
/Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:285:in `run'
/Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:285:in `initialize'
/Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:285:in `new'
/Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:285:in `run'
/Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:268:in `initialize'
/Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:268:in `new'
/Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:268:in `run'
/Library/Ruby/Gems/1.8/gems/rack-1.0.0/lib/rack/handler/mongrel.rb:34:in `run'