Hi,

when I close a tab with the middle mouse button (scroll wheel) a tab close by button down and a next tab close when the button is up again.
If two tabs ar open und I click QtWeb close.
 

Confirmed, will be fixed

Update your software from the web site to 1.7.011, bug should be fixed

I cant close chat tabs with the latest revision. Neither Clicking on the little x button nor with the middle mouse button is closing a chat tab.

edit:
I just noticed:
When click on the Close Button of your Window Manager, KMess will close the current active tab only instead of the whole window
 
thanks

It actually closes all tabs except the last one, which just cleaned up.