title: Git error - unable to unlink old 'some/file/name' (Bad file descriptor)
body: <p>When trying to switch/checkout (in TortoiseGit) to another branch, I get the following error:</p>
  
  <pre><code>error: unable to unlink old 'foo/bar.cfc' (Bad file descriptor)
  </code></pre>
  
  <p>What does this mean?</p>