I can't play the game at all. It was fine untill I installed the new patch. But I have uninstalled and reinstalled without the patch and I still can't get the game to work. The final error line reads:

Could not load OpenGL subsystem.

Anyone know how to fix this or at least get the game to work without the patch??

It's your video drivers. Don't know what card you have, but if it's nVidia based, try www.geforcefaq.com)

Also search for the problem in relation to quake3, since it's the same base game engine. q3 has been out a while, and Im sure you'll find some info to help fix your problem.