That program works fine for me with OpenGL vendor string: NVIDIA Corporation OpenGL renderer string: GeForce4 Ti 4400/AGP/3DNOW! OpenGL version string: 1.5.2 NVIDIA 66.29
I don't think it's ATI specific: Try with Mesa Software rendering or any other X11 3D driver. With fglrx it works partially: 24 Bit color depth works nice, 16 bit fails.
I'll try it with my brothers mach64 card, but I don't expect it to work.
Thanks for the testing, Stefan