witch distro are you using ????
It can help you :
I did compile my kernel(the mdk9.1 originals did not take care of my raid) and I dl the 2.4.21mm-mdk one from the plf group I think.
If you compile it with the kdb debugger it will crash and you cannot compile the nvidia drv
without the kdb it works fine on my computer.
I did not reboot until I install my nvidia drivers I hope not having troubles at the next reboot!
**** off M$ and his ****ing software