I can reproduce it with current feisty without having the fast-user- switch applet installed.
I works for the first time only and leaves my session completely unlocked even though gnome-screensaver is running. I would consider it as quite serious security problem. Imagine you make a break for shopping and let your small 12yo brother login to his restricted account. Smart as your brother is, he switches VCs and does whatever he wants with your data. Replace "brother" with "coworker", "wife" or "guinea pig" at will. ** Changed in: gdm (Ubuntu) Status: Unconfirmed => Confirmed -- Switching back to an user account needs no password https://launchpad.net/bugs/89219 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs