Set a default precompile target to be the application.js, application.css, and...

Set a default precompile target to be the application.js, application.css, and all non-css/js files (images etc)

railties/lib/rails/application/configuration.rb

@@ -33,7 +33,7 @@ def initialize(*)
         @assets = ActiveSupport::OrderedOptions.new
         @assets.enabled    = false
         @assets.paths      = []
-        @assets.precompile = []
+        @assets.precompile = [ /\w+\.(?!js|css)$/, "application.js", "application.css" ]
         @assets.prefix     = "/assets"
       end