There are a lot of resolved game/application and driver issues. Here are a few of the performance improvements with these drivers :
Pixel Shader processing has been enhanced across all of our DX9 products. As a result, certain PS 2.0 ShaderMark tests are now running as much as 12% faster. Unreal Tournament 2003 performance is up considerably for DX9 products running with Anti-Aliasing enabled. This is due to improvements in the driver code for rendering character shadows. For example, the Anubis botmatch test gains as much as 23% The result of this optimization is also apparent in Dungeon Siege, where gains ranging from 3-10% are observed on our DX9 product line-up, when Anti-Aliasing is enabled. Other game titles may also be improved RADEON 7000 gains as much as 25% in Direct3D titles when running at very high resolution (1600x1200). Aquamark, Comanche 4, Dungeon Siege, Expendable, Giants and Re-Volt all gain approximately 20% at this setting. OpenGL titles are not affected Modest gains of approximately 5% are noticed for our DX8 class of products (RADEON™ 9200, 9000, and 8500) in OpenGL games such as Quake III Arena, Return to Castle Wolfenstein, and Serious Sam
Full release notes can be found here