Known issue with this OS, numerous posts on this topic, I don't believe that there's a solid fix for it yet. People believe it may be a Verizon ptt .cod error that's new to this OS
Posted from my CrackBerry at wapforums.crackberry.com
well I made this thread soon after the 530 was leaked out before any issues were uncovered of the reboots. I have already downgraded to .419 and plan to stay here until a better OS comes out