It doesn't work on my iMac DV G3 400. I know that its ATI Rage 128 is very limited, but I think that we'll had to keep both version...
Did You get an error-message so we could include a autoswitch?
Nop... The main window's buffer seems to point to a wrong memory address. I have seen, this bug before when playing with OpenGL and texture on this Macine. Screenshot here: