Argh, I''ve just upgraded my linux system to RH 7.3 and now none of my SDL based OpenGL apps run (even the SDL ports of NeHe''s demos don''t run) The apps compile fine, but crash as soon as the OGL window is displayed. I''ve downloaded the latest NVidia drivers and they seem to be working fine (Tux Racer works like a charm ) Has anyone else come across this? Apart from rebuilding the SDL libs is there anything else I should be looking at? Cheers Keef