When you press Alt-Tab, a black border around the window-to-be-shown rectangle is drawn. It is very ugly, and it's useless too, since I am looking at the window list already. So I would love to turn this horrible thing off.
(I understand that many people love the border for some obscure reason, there was a fight about it in KDE bugzilla too, so I am only asking to please add an option to turn it off)
Also, a hint on where it's drawn in the code would be appreciated. Thanks!