Hi all ;-)

I'm wondering about the eye candy side effects, i'm using kde 4 and using kwin but i have some blinking effects.
I'm using a nvidia geforce 7900 gs and last nvidia driver (177.80 for Linux x86/x86-64 released - nV News Forums )

But i still have my menus blinking, not all the time, but it does blink enough so that i won't tell my friends (newbies in linux) to use kde 4 / kwin .

So is it linked with the driver not able to render all the effects ?
Or is it the gui that's not kwin optimized yet ?

But most of all : When is it supposed to be better ?