At the moment many people have the problem that they are not able to install the fglrx kernel module for ATI graphic cards
with the new 2.6.11.3 kernel. I had this problem too.
After a long time of search if found this:
http://www.webdeko.com/firegl_public.patchIt works. For me the fglrx driver is still very dirty peace of code.
But, have fun!!!