Rats... My ATI Radion Crossfire 1950 wouldn't even allow the program to open. Bummer - good card. Rushed out and bought an ATI VisionTek 5670 for $130 at Best Buy and it cured the problem. So if you get the "OpenGL and OpenGLSL and 32 bit....blah blah blah" msg that's the problem. Video entropy. It'll get is all sooner or later.
On the good side, HitFilm seem stable - not enough time with it to have an opinion about it's functionality yet.