With today's rawhide updates, the following packages resulted in a
nautilus-free login session.
gdm-2.15.6-13.x86_64.rpm
xorg-x11-xinit-1.0.2-7.fc6.x86_64.rpm
All I got was an empty desktop with a functional mouse.
Reverting to gdm-2.15.6-9.x86_64.rpm and
xorg-x11-xinit-1.0.2-6.fc6.x86_64.rpm returned things to normal.
Jay