Hi Anand,
There are no known issues.
Suggestions for you to try are to move the staging environment to be more like the production environment step-by-step to see if you can identify the condition that is causing the problem. Dispatcher rules would be of particular interest if you're using one. You might take into account the URLs provided to your facebook app, which you should have created yourself instead of using the Geometrixx sample facebook configuration on production.
- JK