http://stackoverflow.com/questions/9173384/rails-3-2-actionview-missingtemplate-only-in-production
gem 'coffee-rails', "~> 3.2.1"
gem 'uglifier', ">= 1.0.3"
をgroup assetsの外に出す。
リセット
bundle install rake assets:clean RAILS_ENV=production rake assets:precompile RAILS_ENV=production