When upgrading from 7.3 to 9, I had to reinstall a few things, here is what I had to do (command run from Minotaur with the script 'lab-command'):
./lab-command "cd /usr/local/redhat9/; rpm -Uvh XFree86-xfs_4.3.0-2_i386.rpm fontconfig* XFree86-ISO* XFree86-base* XFree86_4* coreutils_4.5.3-19_i386.rpm gtk2* librsvg* pam* info_4.3-5_i386.rpm galeon_1.2.7-3_i386.rpm gdbm* gdm_1%3a2.4.1.3-5_i386.rpm xml-common_0.6.3-14_noarch.rpm gnome-applets* gnome-icon-theme* gnome-libs-1.4.1.2.90-32.i386.rpm gnome-session-2.2.0.2-4.i386.rpm --force"