Is anyone else having issues while their BB 9930 is plugged in and charging? I have a user who says "the screen and images randomly change and manual controls are uncontrollable and/or do not work. It restores itself as soon as I unplug the charger." This doesn't sound nearly as bad as the previous problems I've been reading about (BB short-circuits after dead battery is recharged, constantly reboots), but it's an annoying one all the same. I believe I updated this BB to the latest software patch level before the user went on his trip (whatever patch requested to be installed on 10/24/11 when I first set up the BB), but I'll double check when he returns in a couple weeks.