I haven't had the rebooting issue since I've updated, but I can go for weeks without a reboot. Though it seems when I do get a random crash and reboot it will happen more than once, usually 3-4 times all within a half hour of each other.
One thing I noticed, and this could be pure coincidence, is that shortly before getting an OTA I've gotten random restarts. Really infuriates me that I've got this incredibly nice piece of hardware and it random reboots like that.
I also seem to be having trouble with games, whether it's Jelly Defense or Dead Trigger, game will randomly crash though it's different with both games. Dead Trigger will always lock up within 30secs of loading a map if I'm using the ps3 controller app. Not sure if it's Dead Trigger or a ps3 controller issue. I have to reboot the device before playing the game, nearly every time otherwise it just locks up and crashes to desktop. Jelly Defense is a bit more random, game will play seemingly fine and be near the end of a level and it will crash and sometimes it won't crash at all.