Thank EDDY.
It was a good guess but the launchers that start the programs are working fine.
Those are on the top bar, and I can click them individually without any problems.
The problem is apparently with the GNOME Applet "Window List 2.30.2" which is in the bottom panel by default. It shows the programs that are already open.
I have reinstalled that also with
Code:
aptitude reinstall window-picker-applet
Something changed a little bit after the remove and installs.
I can click them almost every time, if I move the mouse up from the panel then back on to the applet.
But if I click one program applet, then move left or right to another applet, I cannot left click the second applet.
So, for instance, if I open gedit text editor and a terminal, then minimize and maximize gedit then move the mouse up over the desktop then back down on terminal applet, the terminal applet will respond.
But if I then move the mouse directly to the gedit applet, the gedit applet will not respond. If I right click the gedit applet, or move the mouse up and back onto the gedit applet, it will respond to the next left click.
My temporary user still works normally.