Working on a joint project an error started showing up when trying to perform migrations.
$ rake db:migrate VERSION=0 >rake aborted! >uninitialized constant Compass::Logger
The Solution was to add a line to the rake file, to correctly load Compass::Logger, still no idea why rake needed it.
Another thing to check might be that compass is being loaded before classes which use it. An issue that can happen in Sinatra and Rails apps.
Example Gemfile (for Bundler)
source :rubygems gem 'rails', '3.0.9' gem "compass" gem "haml-rails" gem "pg" gem "jquery-rails" gem "omniauth", '~> 0.2.5' group :test do gem "capybara" gem "factory_girl_rails" gem "test-unit" end