I have a strange problem with the visibility of application windows (Unity / 14.04). Sometimes an application seems to be running, but without a visible window. When I click on their launcher icon, nothing actually happens.
What I do see is some kind of an empty arrow (
>), instead of the usual solid one, and when I take a screen shot, the applications seems to be running correctly, the screen shot shows something I don't see!!
How can I find out what is the cause of this?
After I enabled workspaces, I have another problem: I can move windows between workspaces, it looks as if they are one.