Yesterday, I found that the kernel and ATI Catalyst driver have been updated since August 17, so that, I decided to spend my time for testing them, then use them if there is no problem. Since a few hours ago, the new kernel 3.0.3 and ATI Catalyst has been running smoothly on my laptop. I have tested 2 versions of ATI Catalyst, those are, 10.12 and 11.8.
ATI Catalyst 11.8 (without patch)
This version has been installed without problem and without any single line's patch. My suggestion, use xorg.conf from aticonfig --initial for avoiding any problem (see my previous post), especially if you want to use Desktop Effects.
ATI Catalyst 10.12 (with patch)
I have tried this version on kernel 3.0.3 and it has been running smoothly without problem, however, it need to be patched. For patching ATI Catalyst 10.12, please read my previous post. You can find the link for downloading the patch on that post.
Note: for my other posts about ATI Catalyst, go to this link. You may need to read it.