title: SVN upgrade marked all my files deleted
body: <p>Earlier I had svn version 1.6. I upgraded it to 1.8. When I tried to do svn up on my working copy, it said, <code>upgrade your working copy</code>. So I did upgrade my working copy. But when I did <code>svn st</code>, I saw all my files with status <code>D</code>. May be I incorrectly upgraded my working copy and all the metadata got erased. I haven't committed my changes yet. How do I restore my working copy?</p>
  
  <ol>
  <li>I used <code>svn upgrade</code> to upgrade working copy </li>
  <li>Now if I fire the above command, it does nothing.</li>
  </ol>