You have either a very low end card or driver. There is a known bug in certain NVidia drivers for the GeForce 7 family that cause compilation errors for the lighting shaders (default.fs, default.vs, pro.fs, pro.vs). But that your card failed to compile warp.fs (which is an extremely simple shader) means your hardware and/or driver are just too old to do GLSL properly. You can disable GLSL by setting r_programs 0 in quake2world.cfg. That should suppress those warnings at startup.
