AMD released stable versions of the ATI Catalyst driver package for the Radeon series graphics accelerators. According to the release notes document (located here), improvements on both the features and performance fronts have been brought about.

Feature Improvements

* This release of Catalyst introduces an enhancement to the Catalyst Control Center Information Center. Full Hardware information will be shown for each physical graphics accelerator installed in the system.
* This release of ATI Catalyst Linux introduces preview support for Ubuntu 8.04 ; SLED 10 sp2.

Performance Improvements

* 3DMark Vantage: Performance increases of up to 20% is noticed in the Performance Preset on single card configured systems when using ATI Radeon HD 36xx or ATI Radeon HD 34xx products.
* Company of Heroes DX10: Performance increases of 3% to 12% is noticed in specific maps on single card configured systems when using either an ATI Radeon HD 48xx, ATI Radeon HD 38xx, or an ATI Radeon HD 36xx products.
* Lost Planet DX10: Performance increases of 4% to 15% is noticed in specific maps on single card configured systems when using either an ATI Radeon HD 48xx, ATI Radeon HD 38xx, or an ATI Radeon HD 36xx product.
* Call Of Duty 4 DX9: Performance increases of up to 4% in specific maps is noticed on single card configured systems when using an ATI Radeon HD 48xx product.
* Lost Planet DX9: CrossFire scaling improves up to 1.7x and performance increases up to 80% across all Radeon products when AA and AF is enabled.

Download >> http://ati.amd.com/support/driver.html