Around a month ago I worked on a project at work to rebuild the ninemsn commenting tool which lets our users post comments on our website content (I’ll post a full review when we go live next week - End May 2010).
I spent a lot of time working with Facebook and Twitter integration so that comments that users post on our sites seamlessly flow into Facebook and Twitter as well (the user gives us permission to do so of course).
But lo and behold, since last week I realised that for some reason when the user tried to login using Facebook Connect on our site, the login screen got blacked out like so:
I traced the problem above to the Facebook authentication screen being blocked out when it’s loaded in an iframe (it is supposed to be a pop up window by default). I customised it to load in an iframe so it looks good, and it worked perfectly until last week. So this restriction seems to have been introduced by Facebook only recently.
And if you are migrating then one of the steps you have to do is to officially “Migrate” your Facebook's Application setting in to use the new Graph API backend. You will find that option in your Application settings page as shown here:
Well, good luck guys and if you have any questions then comment using the comment tool below or tweet me on @newbreedofgeek