Sebastian, as I said, if you weren't an admin you'd need an admin to authenticate for you, so the dialog could appear regardless of whether the active user account is an admin.
Chris, software installation/removal inhibiting shutdown is discussed in bug 842799.
Sebastian, as I said, if you weren't an admin you'd need an admin to authenticate for you, so the dialog could appear regardless of whether the active user account is an admin.
Chris, software installation/ removal inhibiting shutdown is discussed in bug 842799.