Hoping someone can help; I haven't seen a recent post on this so I don't know if it's a new issue or what.
I have been a previous premium user, deactivated my account and have come back. The app on my iPod wasn't syncing offline content so I logged off (was logged in with FB) and attempted to log back on.
When I click the "Log on with Facebook" button I get just a spinner and no prompt for credentials.
I uninstalled the app and reinstalled. Same deal. If I can't get it working I will delete the app, cancel my account and request a refund.