yes, login to FB via a PC. Turn off notifications for the BB app and then delete the BB app from FB. Logout of FB on your PC. Login to FB on your BB and use the setup wizard.... should work fine after that.
I just deleted the app. My phone started freezing and going haywire. Why do I always end up having problems with my blackberry phones and their apps? I was better off before I discovered smartphones. Maybe I shouldn't have sold my Droid yesterday LOL