title: Why doesn't tortoisemerge work as my mergetool?
body: <p>I have TortoiseGit installed, and in the past it's used <code>tortoisemerge</code> as my mergetool seamlessly.  But since I upgraded TortoiseGit to 1.8.x, my mergetool is no longer working:</p>
  
  <pre><code>c:\Code\whatever&gt; git mergetool
  merge tool candidates: tortoisemerge emerge vimdiff
  No known merge resolution program available.
  </code></pre>
  
  <p>This used to work, so why is it broken now?</p>