I installed from the tarballs with no issues. I'm running GCC version 2.95.3, kernel version 2.4.18, and I'm using Gentoo 1.2.
One complaint I have is that I was unable to get the kernel module working with 2.4.19. I forget the error, but I don't really need to upgrade my kernel anyway so I'm cool with it
If one of our resident nVidia employees wants me to try to replicate the error for quality control purposes, then I'd be happy to help.