As of ATI Catalyst 9.4 (based on the 8.60 driver) to be released April 2009, AMD will move a number of older ATI Radeon graphics accelerators products to a legacy driver support structure. This change will impact Windows XP, Windows Vista, and Linux distributions. AMD is moving to a legacy software support structure to better focus development resources on future products and ensure driver stability for these mature graphics products.
AMD Internal Document