title: Facebook app request dialog box keep on loading/busy
body: <p>We have a facebook app and our app uses facebook app request dialog very frequently. Most of the time it works pretty well without any error and hick ups, but sometime the FB.ui dialog just keeps on loading and doesn't show the request that it needs to send. 
  When such condition occurs wherever the FB.ui dialog is used, it behaves the same and it just keeps on loading. 
  Interesting thing is that after few hours it starts to work correctly itself (without making any changes) </p>
  
  <p>Each of our team member has a web application server running on their local machine and we all use the same facebook app id. Whenever the scenario occurs, it is visible on each development machine.</p>
  
  <p>Has anybody scene such problem ? </p>