AMD 5870 here. Cat 10.5 drivers.
I'm experiencing the best performance of any of the official or beta patches thus far.
Here are the procedures I use to ensure that everything is configured correctly.
http://www.txsquadron.com/forum/inde...20072#msg20072
One of the best things in this release/hotfix is that fullscreen is working 110% in Widescreen.
Stuttering is greatly improved. The CPU dropouts are gone.
I could probably help more - but many users still have not listed their system specs in their sigs - so I have no idea what hardware/OS folks are using.
Good luck,
S!
Gunny