title: SVN 'Unexpected end of svndiff input' error
body: <p>I'm having a problem with svn, where running 'svn up' produces the following error:</p>
  
  <pre><code>svn: Unexpected end of svndiff input
  </code></pre>
  
  <p>Ironically, running 'svnadmin verify repository_path' also returns the same error. It happens on existing working copies and brand new working copies too.</p>
  
  <p>Anybody had and solved this problem before? We've been using svn for a number of years and know our way around pretty well, but this one has us stumped!</p>