havnt read into it. just found it.
open gl crash fix from microsoft
http://twitter.com/CatalystCreator/statuses/68768083153649664?escaped_fragment=/CatalystCreator/status/68768083153649664#!/CatalystCreator/status/68768083153649664
edit: you may also want to read the recent tweets by catalyst creator:
http://twitter.com/#!/CatalystCreator
http://support.microsoft.com/kb/2466493
rc2 for catalyst 11.5a
http://www.ati-forum.de/software/treiber/3782-catalyst-11-4-preview-update-4/
didnt have time to test it out to give objective feedback. i still get low fps in large areas and with shadows enabled, but maybe it does something for you? try it out if you want. btw. i deinstalled the rc1 hotfix completely with driver sweeper before i installed the rc2.