I'm sure this has been covered elsewhere, it seems so tantalizingly familiar, I just can't find it when searching.

I just set up multiboot on a newer N800. Before this, the N800 did not have any rebooting issues. Now, after a few minutes (3-6 minutes?), the N800 reboots. It doesn't matter whether I am using the OS in flash, or the SD clone. It doesn't seem to matter what I'm doing, either. The tablet can be online or offline. The tablet simply reboots without warning.

I've fsck'ed the SD partition, but that's not the problem, especially since it reboots from flash, too.

(EDIT: I'm using qwerty12's modded kernel...)

Any ideas?

EDIT2: Seems to occur only after a few minutes of IDLE. If I use the tablet, it doesn't reboot. Also, there seems to be a component of charging involved, too. That is, if I unplug the charger, it doesn't reboot.