title: pristine svn-base file missing
body: <p>I'm trying to <code>svn update</code> my SVN working copy with TortoiseSVN but the update fails, asking to perform the clean up first.</p>
  
  <p>However, the <code>svn cleanup</code> fails too stating that a <code>\.svn\pristine\20\20long-namecbf.svn-base file cannot be found</code>. </p>
  
  <p>I've already tried to release the lock but this does not work either.</p>
  
  <p><strong>Any idea how should I proceed?</strong></p>