This was a patch release on 8.18.6, no new features. New features are repeated for clarity.
* Dynamic Clock Gating * Enhanced Support for OpenGL Development * Dual Link Monitor Support * Xinerama Support * New X Server Configuration Utility - aticonfig
* The ATI Linux software driver installer now correctly identifies the XFree86 4.3.99 X server. Resolving an issue with the software driver failing to install * Access to /proc/dri/0/* no longer results in an oops on kernels that have CONFIG_REGPARM enabled