Why is my page iframe application blank for some users? (Facebook request time out)

I have an incredibly simple application that simply fan gates and then offers a form to fill out (contest). I receive and parse the signed_request and display content based on the like_status. My average response time this week is 0.00495 on my index.php.

However, a number of page view requests NEVER reach me. A small percentage of users report seeing a white page. They do not se开发者_如何学运维e an error like a 404 or 501 etc., just a white page.

I can only find out about through disgruntled wall posts because I cannot calculate or diagnose requests that I never receive.

This has been happening MORE this week and it is causing immense issues with a client's contest. While I can offer the explanation that millions of people are hogging Facebook at certain times AND it's return to school week, it's not really helping.

So far an iframe app is like a black box and the wall is the only way to do customer care. If Facebook requests time out before reaching me then I may not be able to offer this service to clients even if it works for 99% of the time.

How have you dealt with these issues in the past because they affect ALL developers of iframe apps now that FBML has been deprecated.

Thanks.