Could it be some leftover gconf settings from previous buggy gdm versions? Can you please remove/move aside /var/lib/gdm/.gconf/apps/gdm/simple-greeter/%gconf.xml and see whether it still happens?
Could it be some leftover gconf settings from previous buggy gdm versions? Can you please remove/move aside /var/lib/ gdm/.gconf/ apps/gdm/ simple- greeter/ %gconf. xml and see whether it still happens?