I don't really know how to get started to even investigate this issue, but with Rubymine 6.3, I get an error when I open Rubymine:
Compass: Failed to run compass
There is no more information. I normally have my gems installed into vendor/bundle, and include this folder in my project in Rubymine so that my gems are indexed and searchable, but if i do this now I get an error for every gem when Rubymine starts. The errors for a gem look like:
"Compass: Failed to run compass on '.../vendor/bundle/ruby/2.0.0/gems/pry-0.9.12.6/lib/pry/config.rb'" (where ... in the path is actually the full qualified path of the file on my system)
When I exclude vendor/bundle from my project, I still get one error. There doesn't seem to be any impact after startup, although I haven't looked into if the new compass functionality works or not. I do have compass-rails included in my project, as well as sass-rails.
My environment is mac OSx 10.9.2, RubyMine 6.3. I use rbenv, and don't install any gems as system gems besides bundler. Each project I work on has gems installed to vendor/bundle in the project. Each project has a .ruby-version to signal the version of ruby - the current project is using ruby 2.0.0-p353.