As is often the case, the new drivers include some performance improvements and bug fixes. With this particular release, ATI says CrossFire multi-GPU performance with Intel P965-based motherboards has gone up, resulting in 6.7-15.8% higher scores in Futuremark's 3DMark 2006. As for bug fixes, ATI says issues with 3DMark 2006, Anarchy Online, Black & White 2, Commandos Strike Force, The Godfather, Serious Sam 2, and World of Warcraft have been resolved.
The new Catalyst 6.10 drivers can be downloaded here. Release notes are available on the same page.