/etc/X11/xinit/Xclients uses "which", but xorg-x11-xinit does not have a
dependency on it nor does any of its dependencies pull it in.
Fix: "Requires: which" or just hardwire GSESSION=/usr/bin/gnome-session and
STARTKDE=/usr/bin/startkde in Xclients.
Changing version to '9' as part of upcoming Fedora 9 GA.
More information and reason for this action is here:
fixed in xorg-x11-xinit-1.0.9-5.fc11