Comment 9 for bug 763680

The reverse sometimes happens: If you switch to another workspace and select a previously unfocussed window, then switch back to the workspace with the fullscreen window, the dash will now be above the fullscreen window. No matter how much you click in the fullscreen window, the dash will remain above it. There is no way to reraise the fullscreen window/hide the dash once this happens, unless you have a dual monitor setup. Then you can click on the background of the other monitor and then click on the fullscreen window.