Quoting Rodd Clarkson <rodd clarkson id au>:
You can --exclude=gdm\* but then gdm is missing a file so it goes to an alternative login screen and this didn't seem to want to work either. So, don't installed redhat-artwork-0.129-2 either. ;-]
Actually, the little flowery thingy that pops up after the error works if you press OK first. It then enables you to actually enter username and password... -- Bojan