Comment 4 for bug 1303438

Same issue for me. When the launcher auto hides, if I move the mouse to the left edge of the screen, there is an animation at the edge, like a thin shadow coming in. If I keep the pointer touched to the edge and keep moving the mouse left, after traveling about half a keyboard lenght after the pointer touched the edge of the screen, the launcher reveals itself. And this is with the sensitivity set to highest.