I was originally on 2.0, which got hit with the reboot bug. I wiped, updated to the hacked 3.0, and was working great again. About two months later, it's rebooting again. I haven't tried the fix yet, but I wanted to sharethe circumstances under which this occurred.
In both cases, the GPS routing was ACTIVE. I had an active route/path and the GPS was giving directions. In the 2.0 reboot case, the GPS started acting erratically, it would show the car somewhere on the map where it clearly wasn't (such as driving on the water). Then it rebooted, and the reboot bug began.
With the 3.0 reboot case, while driving along it just died and reboot and it started all over again. I wasn't doing anything except listening to music, and I didn't even touch the unit. It just rebooted and started all over again. I can't really tell what is triggering this issue, but it doesn't seem limited to the 2.0 firmware. Indeed, it sounds like it might be a fatal flaw in the software that's writing these corrupt files.