I got an E-Mail from Ati claiming that this problem has been addressed in Catalyst 8.5
__________________
System:
Main board:GA-P35-DS3L
Intel Core 2 duo E8400 3.0Ghz clocked as 3.26Ghz
4GB DDR2 800Mhz RAM Clocked as 871Mhz
VGA: Asus Radeon HD 2900XT
Windows Vista Ultimate 64bit/Windows XP pro in Dual boot