Enterprise ~ # modprobe nvidia
FATAL: Error inserting nvidia (/lib/modules/2.6.17-gentoo-r4/video/nvidia.ko): Unknown symbol in module, or unknown parameter (see dmesg)

Dmesg contains:
nvidia: module license 'NVIDIA' taints kernel.
nvidia: Unknown symbol pm_register
nvidia: Unknown symbol pm_unregister
nvidia: Unknown symbol remap_page_range
nvidia: Unknown symbol pci_find_class