Hmm I just got out my NVidia 9600GT box.... I read here.... "Supported Operating Systems: Windows 2000, Windows XP, Windows Vista..." .... hmmm no word about Linux... odd. Theoretically I have no right to complain if I RTFM.
Seriously: The driver has to be fixed but this "I have paid for this... XYZ" just does not work. No one ever said that. For KDE I'm currently using the nv driver and it works. For games I use xgame for a second session and it's awesome. That would be the easiest workaround.