Version:           4.5 (using KDE 4.5.1) 
OS:                Linux

When shutting down, the user first clicks shut down, then either waits 30 seconds or clicks the button to make the computer get on with it, and then after being logged out, may be told that there are other users still logged in, and whether these should be thrown out. This means the user might have to wait quite a while in order to make sure the computer is shut down. 

A possible solution would be to simply note when clicking "shut down" that there are other logged in users, and ask whether these should be logged out too.

Reproducible: Always

Steps to Reproduce:
Log in, then switch user and log in again. Shut down.

Actual Results:  
Was logged out, then asked whether I really wanted to kick out the first user.

Expected Results:  
I would have liked the question to come straight away.

Essentially, this makes it hard to trust the "wait 30 seconds" feature, which otherwise is really great.