Hmmm. I'm not sure if any of those are the reasons, but they sound feasible. I think that hard crash of the game still is the best bet, but I now play without the screen saver, my Spy Sweeper, or my AV. Better safe than sorry.
(at least I don't have the torch issue that the other poster seems to have! <img src="/ubbthreads/images/graemlins/eek.gif" alt="" />)
