Tremulous has something about it that OpenGL Profiler won't touch. I've found I can launch Halo Demo and UT2K4 Demo with OpenGL Profiler, with no problem at all. However, when it comes to Tremulous, it just won't do it. I've tried to sudo open OpenGL Profiler, to see if maybe it was a permission problem, but that didn't work either. Not even mighty root could make OpenGL open Tremulous. It's a lost cause which we should stop pursuing.
