There's a major open source ATI Linux driver update available.
Phoronix's Michale Larabel has the story.
"If you use the open-source ATI Linux graphics driver, there's a major stable update available. At long last, xf86-video-ati 6.14.0 has been released," Larabel reported. "This open-source X.Org driver brings official support for the Radeon HD 5000 series, Radeon HD 6000 series, and AMD Fusion Ontario hardware. This release also has a plethora of bug-fixes and flips on the KMS page-flipping support."