When the user has additional TTYs open (Ctrl-Alt-F1) the logout confirmation for these TTYs is asked only after the KDE shutdown confirmation and the "logout sound". At this point the user walks away from the computer for the night, and not until the morning does he notice that the machine did not shut down but rather is waiting for permission to log out the additional TTYs.

I suggest that the additional TTY confirmation be shown either before the shutdown confirmation, or better yet integrated along with it.