"Login screen" is gone from System settings menu (not listed in any menu) (/usr/share/applications/gnome-gdmsetup.desktop) Also, it no longer lists existing users when choosing to automatically login a user at boot time.
*** Bug 178461 has been marked as a duplicate of this bug. ***
gdmsetup is back in the menus
*** Bug 179382 has been marked as a duplicate of this bug. ***