what test case? KDE4 settings? driver settings? pics? screen captures? or you just posted for nothing?
I'm not who you are asking those questions to, nor Im going to make this bigger but KDE + nvidia is a pain in the a$$ for may of us. And that is a fact.
Actually is the only think that keeps me from using my personal computer (I dont use anything but KDE)
But I'm also going to buy an ATI card soon (or maybe an intel and forget about casual gaming)