I've just upgraded to Hardy 8.04 LT from 7.10 and I can't believe how slow the scrolling is while listing trough a PDF document in the default PDF browser or scrolling down a web page in FireFox 3 Beta.

Can someone please help me to fix this problem?

I've also found some old threads about the same problem:
http://ubuntuforums.org/showthread.php?t=708928
In this thread there is a small fix to this problem by configuring this file
Code:
/etc/X11/xorg.conf
Can someone read the second post in the mentioned thread and show me how to configure my file?

When I open it, this is what I get under "section Device"
Code:
Section "Device"
	Identifier	"ATI Technologies Inc RV350 [Mobility Radeon 9600 M10]"
	Driver		"fglrx"
	Busid		"PCI:1:0:0"
EndSection