http://www.insanelymac.com/lofiversion/index.php/t89883.html

I have the feeling it is actually related to the mouse skipping problem, but i am not sure. When I leave the computer away, it will eventually have this error and reboot.
If i use it intensively, eventually my mouse starts skipping (at the beginning, for hours, it is completely fine), then all of a sudden system performance degrades, and i get a spinning wheel. Since i am working, i usually just reboot, so i don't know if, had i waited, that would go into that stupid error 0xffff0315.

If it is of any use in our struggle against the mouse-skipping thing: I thought it was due to my lan interfaces (the damn nforce and marvell which don't work perfectly). I completely deactivated them in the bios, and removed them from my hardware list under mac os.
Now i use internet through firewire (i use my macbook as an expensive and bulky wireless modem, basically). I still get the mouse-skip problem...
Decreasing HT helped, i think. but still, it can get buggy.

if you look up my name in osx.kbot.de, you should see a couple of threas where i was trying to reach you ..
Thanks man