The radeonhd developers discovered & fixed several bugs in xrandr while developing the RandR 1.2 support for their driver: <http://lists.opensuse.org/radeonhd/2007-11/msg00297.html> Would it be possible to update xrandr to the latest git sources? <http://gitweb.freedesktop.org/?p=xorg/app/xrandr.git;a=commit;h=20c8a60950cb5b4ddef305dc9822bec1c33e938c>
This has been fixed for F9/F10.