Last week, AMD released a Catalyst driver hotfix in preparation for the launch of Ubisoft Montreal's Far Cry 2. The fix was supposed to improve DirectX 10 graphics performance for Radeon X1600-series and newer cards in the open-world shooter, and AMD said owners of CrossFire setups could also expect improvements in the game's DirectX 9 mode.
Today, you'll find a new hotfix at AMD's Customer Care website. AMD tells us this second hotfix "fixes image quality issue [sic] that was introduced in the preview Far Cry 2 hotfix release posted last week." Surprisingly, the update supposedly improves S.T.A.L.K.E.R.: Clear Sky performance in DirectX 10 mode, as well. (Clear Sky came out back in mid-September, so it's not exactly on the bleeding edge.)
You can grab the second hotfix from this page for both Windows Vista and Windows XP in 32-bit and 64-bit flavors. Once again, AMD says this release only applies to owners of graphics cards from the Radeon X1600 series to the Radeon HD 4800 series—check out the download page for a full list.