sorry, no nvidia playing here, its a Radeon 9800 Pro ^^ (old drivers though, bc i didnt wanna patch to the framework drivers)
but it served me always well, despite several issues that i always figured out myself in the logic way (step by step elimination)
about this gamma thing however i cant say anything, seems to be quite random, today was also set back when the game crashed
after running the normal (not the debug) exe 2 times it got bright again ..... well ... gamma setting is 1.25 if somebody's interested
the menus are getting visible then without being annoying like the green splotchy background, thx for the menu question, i suspected that