after updating to latest rawhide i get a message popping up at gnome start, saying: There was an error starting the GNOME Settings Daemon. Some things, such as themes, sounds, or background settings may not work correctly. The last error message was: Unable to determine the address of the message bus (try 'man dbus-launch' and 'man dbus-daemon' for help) GNOME will still try to restart the Settings Daemon next time you log in.
fixed it by installing the dbus-x11 package. maybe some dependency on this would be good.