Don't know where to report it and whether it's affiliated with the issues regarding tinygl you are discussing here, but Quake 3 Arena suffers from textures falling in various maps (not the default ones though). For example OSP CTF2 (Crossing Paths), on the centre place where there should have been fog, there are white boxes instead. Tried to take a grab via builtin Quake III grabber but graphics appear heavily scrambled on the image. If needed I can shoot a photo. This is happening to a lot of custom maps such as Short Circuit (DM map) - I can list some more if needed.