I have a ATI X700 pro with 256 MB of ram.
I have had nothing but grief since the last version 2.6 came out. Lots of stutters a 1 to 2 second freezes that usually end up with me in the ground.
Lots of the stutters were in fields that are burning. Smoke and clouds played havock with frame rates.
Anyways lots of other grief.
What I did was to remove all of the ATI drivers and other software, and then use the 4.12 drivers with the ATI Control Panels 6.14.10.5134 bundle.
Click on the link that reads; RADEON Previous Windows XP Drivers and Software versions prior to CATALYST 5.1 / Multimedia Center 9.03.
I couldn't get the link to the actual page to work, sorry

You have to look under previous drivers and software.
I am now back to 1600 X 1200 1012 Textures, vetical sync set to 60 fps. And the smoke lockups and stutters are gone. I can get some lowering of framerates in furballs and smoke at the fields but still well over 30 fps.
Hope this helps someone
