Using a ATI card that requires a Mach64 driver the link to the driver: /etc/X11/X -> /usr/X11R6/bin/XF86Setup when it should have been : /etc/X11/X -> /usr/X11R6/bin/XF86_Mach64 The correct driver was installed, just not linked.
This should be fixed as of beta3; please re-open if it persists.