First, THANK YOU for the Xfree4 packages. I upgraded just a half hour ago and
everything is working great.
Second, there's a small incompatibility between "*-0phase2v4" and gdm.
In /etc/gdm/PreSession/Default I find:
/usr/bin/X11/sessreg -a -w /var/log/wtmp -u /var/run/utmp -l $DISPLAY $USER
Unfortunately, there is no "sessreg" program in the Xfree4 packages.
This prevented gdm from logging in until I commented out the call to
sessreg. Anything involving session management could have security
issues, so I figured it was important enough to report.