nope I disagree if the file is required when opening the "gdm" session manager and not present in the system : IT IS A BUG ! ; whichever theme you install "gmd" should go with a dummy file at least !
-- Session bug with gdm https://launchpad.net/bugs/67727 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs