I have an issue with the old sdk. Whenever I try to authorize a new user I get redirected to the home page of my app in the iframe. However, after I close the iframe and refresh the page, I can easily authorize a user. But whenever I delete the application from my facebook account and try to authorize it, I'm back to the previous problem.
I've noticed the same bug in the different web applications. Hootsuite could be a good example.
Did facebook change the old api or did they change the authorization proces lately ?