I'd hoped that the first two devices having this issue were just a fluke, but it's happening with my 3rd (second replacement) now. If I put the phone down on my desk, sometimes it just reboots like I pulled the battery. Often when I get into my car and put it into the cup holder, it does the same. I don't think I'm being excessively rough with it, certainly not rough enough to make this happen. I've checked and the case seems structurally sound, and there's no wiggle room in for the battery back there.

Has anyone else experienced this issue with an 8110?

Something is wrong with the Aeon Flux Capacitor in the phone. Seems defective.

It's pretty annoying considering I've replaced it twice already. :D Oh well, when the new models come out later this fall I'll be switching it out anyway.