Comment 3 for bug 1761873

We add "(as superuser)" if the process which owns the window claims to be owned by user 0, i.e. root.

Please reproduce the problem, then do

$ xprop|grep _NET_WM_PID

and click on the window with the problem. xprop will say something like

_NET_WM_PID(CARDINAL) = 1586

And then do

marnanel@grantham:~$ ps aunx|grep 1586

(with 1586 replaced by whatever xprop told you). This should say something like

1000 1586 0.0 1.2 188156 52000 ? Ssl Mar22 11:41 /usr/lib/gnome-terminal/gnome-terminal-server

and then tell us what it says.