/Users/Chris/.rvm/gems/ruby-1.9.2-p290/gems/rack-mini-profiler-0.1.7/lib/mini_profiler/storage/file_store.rb:43:in block in initialize': undefined methodinstance’ for Rack::MiniProfiler:Class (NoMethodError)
When starting our rails server via: thin start
I notice if I remove the Mongo gem in our gemfile, the error goes away.