Today my 8330 had a weird glitch.
When I pulled the phone from the holster, the home screen had a "window" in the middle of it that was displaying a live feed from the camera.
None of my buttons worked except the track ball.
The issue resolved itself when I did a battery pull.
Yeah that happened to me the second day i had my blackberry! i also did a bettery pull and it worked fine after that..not sure why it happens but it does..
Yeah, a reset is needed because the device freezes up due to all of the simultaneous commands and apps being opened all at once when multiple buttons are being pressed. Battery pull is in fact the only solution at that point.