Comment 6 for bug 441669

I don't know what exact version. With previous version I mean Jaunty (and Intrepid, and hardy, and gutsy).
The behaviour was different:
If the restricted user tried to shutdown (the local machine) while a remote user(with elevated privileges) was logged in, the restricted user would get a dialog staing the system could not be shut down because an elevated user was using the machine. Once the elevated user was logged out the restricted user could shut down the machine...