title: Odd code added just before close body tag
body: <p>My client is reporting that code looking like this has been automatically added to the end of all PHP files (just before the close body tag):</p>
  
  <pre><code>&lt;b1&gt;&lt;!--J5qN2aS2eNoNycENgCAMAMCNqEoUnYZA04DRUgI1rC+f+xxwUdDQEuliwe5u3U+wzm3HBWMMkxpR0Qnmr2E2KAyDIqAUnQGM3H0NiXwUed67q6m5/t4jHpA=--&gt;&lt;/b1&gt;
  </code></pre>
  
  <p>He tried manually deleting that line, but of course it reappears. Googleing returns very little:</p>
  
  <ul>
  <li><a href="http://www.sitepoint.com/forums/showthread.php?t=652089" rel="nofollow noreferrer">http://www.sitepoint.com/forums/showthread.php?t=652089</a></li>
  </ul>
  
  <p>Can anyone help point us in the right direction? Anything particular to look for?</p>