thanks for the additional information.
I have tried the 1.0-3xxx driver (using it now) with my Ti-4200 as a result of your post. Unfortunately this also crashes with my system: setting BIOS to use normal "PIC" interrupts, accepting setup defaults in the settings having to do with AGP, setting NvAGP to 0 in the XF86Config....
tuxracer crashes. RTCW crashes.
glxgears doesn't crash --of course I don't run it for very long, but inspired by that I changed tuxracer to run in a window and when run that way, Tuxracer won't crash.
Fullscreen OpenGL anything crashes with my Ti4200, regardless of agp setting. GForce2 is fine as always.
This IS a driver issue.