Hello, I'm encountering problems when trying to use lighting in the SDL Ports of NeHe Tutorials. when I switch on lighting (i.e. in lesson07) the programm crashes with a Segfault: -- ./lesson07 Light was: 0 Light is now: 1 Fatal signal: Segmentation Fault (SDL Parachute Deployed) --- Same error occours in every lesson with lighting activated by default, or when activating lighting. I use gentoo linux with no special 3D graphics card, I use Mesa 6.0 for software rendering on Xfree86 4.3.0 Any help very appreciated