ATI released an updated hotfix to address the following issues:
Far Cry 2 - fixes image quality issue that was introduced in the preview Far Cry 2 hotfix release posted last week
Stalker Clear Sky - this hotfix includes Stalker performance enhancements for the DirectX 10 version of the game. Also be sure to download the Stalker Clear Sky DirectX 10.1 patch, which will provide further performance enhancements (up to 10% at higher resolutions) and image quality enhancements over DX10.
We strongly recommend you download the game patch and test it in conjunction with this Catalyst hotfix