title: rvm & duplicate environment variables (rubymotion)
body: <p>I think I have a gem installed twice but I don't know how to uninstall one of them. When I try to build my rubymotion project I get these warnings:</p>
  
  <pre><code>/Users/pachun/.rvm/gems/ruby-1.9.3-p194@global/gems/bundler-1.2.1/lib/Bundler.rb:12: warning: already initialized constant ORIGINAL_ENV
  /Users/pachun/.rvm/gems/ruby-1.9.3-p194@global/gems/bundler-1.2.1/lib/Bundler.rb:64: warning: already initialized constant WINDOWS
  /Users/pachun/.rvm/gems/ruby-1.9.3-p194@global/gems/bundler-1.2.1/lib/Bundler.rb:65: warning: already initialized constant FREEBSD
  /Users/pachun/.rvm/gems/ruby-1.9.3-p194@global/gems/bundler-1.2.1/lib/Bundler.rb:66: warning: already initialized constant NULL
  </code></pre>
  
  <p>And regular builds still work, but I think this is causing my test suite (frank cucumber) to fail.</p>
  
  <p>How can I fix this? Thanks</p>