updated to rails 3.1.rc5

config/environments/development.rb

@@ -21,4 +21,7 @@ Danbooru::Application.configure do
 
   # Only use best-standards-support built into browsers
   config.action_dispatch.best_standards_support = :builtin
+
+  # Do not compress assets
+  config.assets.compress = false
 end

config/environments/production.rb

@@ -11,9 +11,8 @@ Danbooru::Application.configure do
   # Disable Rails's static asset server (Apache or nginx will already do this)
   config.serve_static_assets = false
 
-  # Compress both stylesheets and JavaScripts
-  config.assets.js_compressor  = :uglifier
-  config.assets.css_compressor = :scss
+  # Compress JavaScripts and CSS
+  config.assets.compress = true
 
   # Specifies the header that your server uses for sending files
   # (comment out if your front-end server doesn't support this)