I read your thread over at Registered users forum, and something is bothering me. You say to allow gamma correction input for texture maps, since they generally  have a 2.2 gamma out of the camera , and of course, they do show a lot less dark this way, but if you output a 2.2 gamma to the render, won't the texture be overburnt in the render? I would think an input gamma of 1, and an output of 2.2 would be correct.
This is what is explained in last month issue of 3D World anyway.