FC4. During installation I selected "Russian" language. After reboot, when firstboot was started, I get windows "Adding users". I can not switch to English, current layout only Russian. In this time /etc/X11/xorg.conf contains only "ru" keyboard layout. I had to refuse adding new user, and , after firstboot finished, xorg.conf modified and everything works fine. After this I have to add users manually. In RHEL4 situation is the same.
This should be fixed in FC5.