title: Could not find i18n-0.6.0 in any of the sources
body: <p>I just upgraded from Rails 3.0.3 to 3.2.1. The upgrade went smoothly on my Mac but I'm having trouble getting a 3.2.1 instance of my app running on my Ubuntu production server. The error I'm getting is this:</p>
  
  <pre><code>Could not find i18n-0.6.0 in any of the sources (Bundler::GemNotFound)
  </code></pre>
  
  <p>Obviously, other people have had this same problem before. Unfortunately, <a href="https://stackoverflow.com/questions/7060069/bundle-install-not-installing-all-dependencies">the solution here</a> doesn't fix it for me. Doing <code>sudo bundle install</code> doesn't seem to make a difference.</p>
  
  <p>I also found <a href="https://stackoverflow.com/questions/9367880/rake-aborted-cannot-load-such-file-bundler-setup">this post</a> but I don't understand what exactly the OP did that fixed the problem.</p>
  
  <p>There's <a href="https://stackoverflow.com/questions/6676890/passenger-says-bundlergemnotfound-error-while-the-bundle-install-says-its-ther">this post</a> as well but the OP's problem there just kind of went away by itself.</p>
  
  <p>And I do have the <code>i18n</code> gem installed:</p>
  
  <pre><code>$ gem list | grep i18n
  i18n (0.6.0, 0.5.0)
  </code></pre>
  
  <p>I have no idea what could be wrong. Any ideas?</p>