I am using GNOME-Classic and my window switcher is the Compiz Static Application Switcher. My problem is, when I press Alt+Tab, the switcher gives me the choice between windows of the whole workspace.
So if I have one terminal opened in the first screen, and one terminal open in the second one, I can't know which one is selected and open the bad one 50% of the time. On my older ubuntu version (10.10), I hadn't such a problem, so I think there may be a solution to avoid it.
I found in this post that this is not possible to have one workspace/screen, so there's probably something I miss somewhere else.
Edit (summary): when I do Alt+Tab in one screen, I want to only see the windows I have in that screen, not the other one.