Not much news on the performance front but it does include support for Stanford Universities new beta Folding@Home GPU client (for the ATI Radeon HD 2000 Series, and ATI Radeon HD 3000 Series).
Resolved Issue highlights
Unreal 3 engine based games(Unreal Tournament 3, Gears of War, Bioshock, Rainbow6 Las Vegas) Forced AA support under CrossFireX configurations: Users can now enable Anti-Aliasing in the Unreal 3.0 engine (DirectX 9 mode) games using the Catalyst Control Center in CrossFireX configurations.
Company of Heroes: Setting the in-game options to maximum levels no longer results in the game exiting to the desktop after the game has completed loading.
Crysis: Setting the Catalyst Control Center->Advanced View->3D->Standard Settings to Optimal Quality and having certain in game option settings no longer results in the game failing to render properly.
Doom 3: Setting the in game options to Ultra Quality and the screen size to 1600x1200 no longer results in the image next to the text failing to be rendered.
Hellgate: London: Flickering is no longer noticed when quitting and then relaunching the game when the in-game setting are set to their maximum levels.
Lost Planet: Setting AA to either 4x or 8x no longer results in the game failing to respond. Further details can be found in topic number 737-28492
Tabula Rasa: Setting the graphics option to enable Deferred Lighting and Dynamic Shadows no longer results in corruption being displayed.
Tomb Raider Anniversary: Performance improvements are now noticed when playing the game with CrossFire enabled.
You can grab the Catalyst 8.4 drivers for Windows XP and Vista (32-bit and 64-bit) from the AMD GAME website which is here.