I was just testing my iPhone app's Facebook Connect functionality when a new problem cropped up with the login portion of it. At first I thought it was my app (eventhough I haven't rebuilt it in a few days) until I looked it up online. Apparently there is a new bug that's cropped up as of yesterday: http://forum.developers.facebook.com/viewtopic.php?id=33467 Anyway I thought I'd give everyone the heads up on this so you don't spend hours debugging a problem you can't fix.
