looking at your photo... i know its small and my eyes arent what they were,, the two little fill colour boxes on the bottom left toolbar look like white and green to me.

Sorry mate, I really cant offer any more advice, but I really do feel your pain, even after I had sorted mine out to acceptable level, it was never right and combined with a few niggly faults on other programs [not colour related] I finally conceded defeat and formatted the machine and started again. All works perfectly now but to this day I still don't know what caused the initial issue [in cs3, everything was so oversaturated and odd hues but bridge was fine] and why even when that was solved it then muted all the colours. :shrug: Its very very frustrating and was only help from people on here, like chappers, and others, that stopped my throwing the machine out of the adjacent window!Tried that, plus resetting preferences. It will show black as a canvas colour but will not show black as a fill colour.
See pic - green should be black.
http://i4.photobucket.com/albums/y120/bonedome/green.png