I noted a bug in the way Flixster Movies’ Facebook Connect publish button worked over on the MobileContentToday blog. Looks like a fix for it is on its way:
I am the developer of Flixster for iPhone. We are aware of the bug where hitting the “publish” button does not close the dialog (it is actually a facebook bug that they have been really slow to fix). However, we are taking proactive steps to have it fixed and it will be fixed in our upcoming update (currently under review by Apple).