I have AT&T BlackBerry Bold but I'm on a different carrier overseas. No reboots, knock on wood. I did an upgrade, Viigo and Facebook works. Among others, Profiler Pro, BerryBuzz 2.0, Roblock.
.314 reboots on me all the time though, every 2 hours. Also, those with the cradle charger, I noticed from .314 and .348 now charge. Doesn't give that error stating the USB Power isn't enough power.
Blackberry Bold by AT&T - Current
Blackberry Curve 8310 Gray - Spare
Blackberry 8800 - Past