System Settings -> Displays -> Launcher placement == All displays
If I set the launcher to only appear on a specific display, the launcher (and menu bar) no longer steal input from any full screen windows. This problem seems like a bug in Unity. I haven't tested it with a different video driver.
Update:
This only happens when this option:
System Settings -> Displays -> Launcher placement == All displays
If I set the launcher to only appear on a specific display, the launcher (and menu bar) no longer steal input from any full screen windows. This problem seems like a bug in Unity. I haven't tested it with a different video driver.