I just switched to KDE for testing and I found something quite funny:
The KDE Kickoff Menu showes up after about 1 - 2 seconds when it is klicked on.
(Klick 1 - 2 Seconds (System Freezes) Kickoff appears.)
The System freezes completly.
Not only the menu, everything.
I switched in the effect to monitor Framerate, this is when I discovered the freezing.
But now to my System:
Fedora 12 newest Release (Update today)
CPU: AMD Turion 62
HDD 250GB Scorpio Blue WD
Grafik: Nvidia 8400GS (256MB Ram)
Well thats all there is to say to the Laptop.
I discovered this on my other two Laptops as well.
One of them uses Fedora 11 the other on Fedora 12 Beta (not yet updated)
Does any one know a solution??