title: Facebook redirect url issue OAuthException
body: <p>My app was working well for long time, but now I am getting the error from Facebook saying: </p>
  
  <p><code>Content: {"error":{"message":"Error validating verification code. Please make sure your redirect_uri is identical to the one you used in the OAuth dialog request","type":"OAuthException","code":100}}</code></p>
  
  <p><code>https://www.facebook.com/dialog/oauth/?client_id=163840537126360&amp;redirect_uri=http://mycloud.niranjan.com/facebook/callback//empty/?vTitle=Facebook&amp;scope=email,sms,user_about_me,friends_about_me,user_activities,friends_activities,user_birthday,friends_birthday,user_education_history,friends_education_history,user_events,friends_events,user_likes,friends_likes,user_location,friends_location,user_photos,friends_photos,user_videos,friends_videos,user_relationships,friends_relationships,user_status,friends_status,user_checkins,friends_checkins,read_stream,publish_stream</code></p>
  
  <p>Can anyone suggest a solution for this one?</p>