I have a Curve 8330 with Verizon.
I tried to download the new 5.0 BB messenger (BBM). After it downloaded the icon was missing. I could see the application in my application list. I decided to do a backup to get the old version back - BIG MISTAKE!
Now my web browser is gone and the BBM is still missing.
I read on one of the threads to go and reload the service books through the e-mail settings. My e-mail settings wizard is gone too!