title: ref=ts on facebook app url cause app not found error
body: <p>I've create an facebook app and it run smoothly at
  <a href="https://apps.facebook.com/icoloringstar/" rel="nofollow">https://apps.facebook.com/icoloringstar/</a></p>
  
  <p>But the problem is: when I search my app name "icoloring star" in facebook, it link to the app at url:
  <a href="https://apps.facebook.com/icoloringstar/?fb_source=search&amp;" rel="nofollow">https://apps.facebook.com/icoloringstar/?fb_source=search&amp;</a><strong>ref=ts</strong></p>
  
  <p>Then facebook said that:</p>
  
  <p><em>App "iColoring Star" is unavailable
  The app "iColoring Star" is temporarily unavailable due to an issue with its third-party developer. We are investigating the situation and apologize for any inconvenience.</em></p>
  
  <p>We found that url part "ref=ts" cause above problem, but really do not know why?</p>
  
  <p><strong>Could you explain me why and how to resolve this problem?</strong>
  Thank you very much.</p>