If it helps zuul, I crashed twice last night while playing (and by crash folks, I mean UT2k4 crashed -- not my system. All I had to do was restart the game). Never crashed pre-patch. Athlon64 3000+, 1GB RAM, GeForce4 Ti4200. I'm not sure if it's that the patch is inherently buggy or if it's because the servers haven't upgraded yet and there's a slight problem between the two versions. I suspect the former though.
Crashed once while flying a Raptor, right before I was about to die, and once while flying around a Redeemer (no clue if someone was taking me out or not).