I started having reboot issues immediately after the OTA. I never had a single reboot before the OTA, I bought my TB on day 1, and downloaded the OTA on day 1 of its availability. And I have suffered ever since. 2-3 reboots a day minimum.
3 days ago and completely fed up, I took it to my local VZW store. The tech downloaded and installed "Advanced Task Killer" from the market and said this should help. I have read all the articles here explaining in great detail how and why these are not recommended. I know, I KNOW!
Funny thing is, still no reboots since that installation. And my battery has been kick ass, despite the warnings that just the opposite would happen.
So, no, I'm no android guru nor a shill for the app, but if you just want your phone to stop rebooting over and over, for God's sake try this. It has worked for me so far, despite all the self-proclaimed geniuses telling me and everyone else that come here looking for help how foolish using this app is.
the app is set to kill aggressively every 30 minutes, but i have told it to ignore my email client, weather, and google talk apps. 3 days now, zero reboots. Never happened since I downloaded the OTA. Can't be a coincidence.
Doesn't explain the phenomenon, therefore not a totally satisfying or true fix. But a gigantic stress reducer for me till the situation is fully understood and eliminated. If you suffer like I did, then you should at least try this, sounds like some people have even worse reboot issues than I did, so it seems likely this may not solve everyones reboot issue.
But for whatever its worth, if you got it bad, give it a shot.