Go back into the options in the Facebook app, and uncheck Leave email notification messages on mail server. Also run the setup wizard and make sure you have the right email account associated with facebook.
when it Loads 5.0 it RESETS ALL Options in FB as if you did a Fresh install of FB on a NEW Phone. Just go into Fb Options in your BB and reset it all. Should Work Fine. Also see if you can reset you E-mail Verification.
So reinstalled the FB app and it's still not recognizing the notifications. Any other ideas?? I can't think of what would be doing it. Maybe my hotmail account?