OK, call it a hunch but could the reboots be related to the processor (internal) temperature sensor and a thermal overlimit condition? Someone I know and trust (and works in IT) has claimed that there are no reboots while sitting on a sealed ice pack. It stays up for hours while normally it reboots often. I'd be willing to test it but am out on the road through the weekend and cannot. Anyone else willing to give it a shot?