title: svn: E155016: The file 'xxxxx' has no checksum
body: <p>I got error when execute 'svn upgrade'.<br />
  I had used svn 1.6 in Mac OS Lion. And i updated to Mac OS Mountain Lion few days ago. <br />
  so i have to upgrade svn.<br /></p>
  
  <p>I usually use Terminal application and execute svn command in CUI.</p>
  
  <p>when i execute 'svn update'</p>
  
  <blockquote>
    <p>$ svn update<br /> svn:
    E155036: Please see the 'svn upgrade' command svn: E155036: Working
    copy 'xxxxx' is too old
    (format 10, created by Subversion 1.6)</p>
  </blockquote>
  
  <p>when i execute 'svn upgrade'</p>
  
  <blockquote>
    <p>$ svn upgrade<br />
    ... <br />
    Upgraded
    'aaaaa'<br />
    Upgraded
    'bbbbb'<br />
    Upgraded
    'ccccc'<br />
    Upgraded
    'ddddd'<br />
    svn: E155016: This working copy is corrupt and cannot be upgraded.
    Please check out a new working copy. svn: E155016: The file
    'eeeee'
    has no checksum</p>
  </blockquote>
  
  <p>BY the way, the error file has Japanese Character in file name.
  Maybe this is cause.</p>
  
  <p>So How should i resolve this problem? <br />
  Thanks.</p>