Installed F8 on my iMac successfully. But using fglrx gives a strange problem (no matter if I'm using KDE or XFCE): The moving of open windows is extremely laggy. 3D is working at acceptable speed.
I've already had this problem on a x86-server at home, for then I decided to stick with the radeon-driver.
I already tried to disable several xorg.conf settings (AIGLX, compositing), but nothing helped.
I'd appreciate any help or idea.