honestly, try the movement test again, it looks to me like your core 0 diode is faulty. that's the only thing i can think of and it seems to be happening a lot to quad cores.
it's been such a long day, i don't even remember making that other post =].

EDIT:

Oh, and you may just have a lesser chip.
not the end of the world though...load temps aren't that bad. you could probably go to 3.4 without much worry.