Comment 2 for bug 843958

As a test, I installed ccsm and went to General Options. I went to the Focus and Raise tab and unchecked it. Now, when I move my mouse around, the unity menu bar behaves how I would expect it to, but using this setting results in other less desirable behaviors when interacting with non-maximized applications.

This is more or less a problem created by the new Unity layout, combining the menu and the title bar and then hiding the menu bar, resulting in very little to click on other than application chrome. Traditionally, window managers would not wind up in this situation. Compiz/Unity will have to be smart enough to jump in and out of different focus modes or Unity on a multi-monitor system will feel clumsy.