title: Retrieval of user's likes using Facebook Graph API sometimes fails
body: <p>in our game I'm checking if user is liking some of our Facebook sites.
  For most users its working but there are some complaining that they are
  having problems with this functionality.</p>
  
  <p>1) I'm requesting "user_likes" permission during logging to Facebook
     ( users must be logged ).</p>
  
  <p>2) I also take into account so called "paging" of result via Graph API.
  ( I'm retrieving all user's like-ids piecewise and after many tests
  I assumed that it's working fine :o) )</p>
  
  <p>3) Those users that were reporting that this check isn't working
     really "like" those sites (before running this check).</p>
  
  <p>So my assumption is that request "me/likes" fails or doesn't work
  as expected under some conditions. Can someone help me with this
  problem?</p>
  
  <p>It seems that I'm not alone because I found these (unluckily unanswered):</p>
  
  <ul>
  <li><p><a href="https://stackoverflow.com/questions/10772814/checking-facebook-graph-api-for-user-likes-fails-for-some-users">https://stackoverflow.com/questions/10772814/checking-facebook-graph-api-for-user-likes-fails-for-some-users</a></p></li>
  <li><p><a href="http://facebook.stackoverflow.com/questions/10109773/cant-obtain-user-likes-in-some-cases-using-facebook-graph-api">http://facebook.stackoverflow.com/questions/10109773/cant-obtain-user-likes-in-some-cases-using-facebook-graph-api</a></p></li>
  </ul>