I and several others are getting the same (or similar) crash. We posted in the Technical Assistance forum under the thread "game freezes"
DEVS, is there anything I can do on my computer that will log the crash or anything else that would help you pinpoint this? I know this is a tricky one to fix just going off descriptions, but I will sum up again:
The lock-up happens most often for me online. More than half the time it happens when I am in an accident or hit a kerb, so thats what made me first think it was sound-related. What will happen is the game freezes, and the last playing sound will loop. It stays locked for about 10-20 seconds, then i get dropped out of the server to some LFS screen (i dont remember which one) and I get a message about lost connection to host.
I can rejoin the server but it usually locks up again.
EDIT: I almost forgot, very rarely when I get the online crash, sometimes I dont get disconnected from the server. Sometimes it will just unlock itself, BUT, then a portion of my car graphics will be messed up. For example one time it locked up for 10 seconds, unlocked, but then my car had some grey polygons sticking out of it (viewable from inside and outside). That has happened two or three times, with the random grey polygons sticking out of a part of the car.
Now the weird part, and it may be the same lock up or a different one. When I am offline, I sometimes get a lockup (but it is more rare). In that case, it never unlocks, and I get a bluescreen. The bluescreen talks about the file nv4disp.sys (i think). Now, I have gotten this same lockup and crash in Oblivion (and someone else reported that they also get this lockup in both games).
My system is not overlocked or anything like that and works flawlessly in all other games and apps.
Athlon X2 3800
ASUS A8NE (Nforce4 Ultra chipset)
2 gig ram dual channel
EVGA 7800GT (i tried a bunch of AA and AF settings, and turned off write combining - none of these changes helped)
Creative X-Fi xtrememusic
DEVS please let me know how else I can help, I really want to get this resolved!