Comment 20 for bug 103306

They're also used for events like activating scale when you move to a screen corner or scrolling the mouse wheel on the edge of the screen to change viewports. In this case we're only using them for window movement but that is not their primary use upstream so your idea for a fix would not work. We just have to setup our defaults to not use any window edges or corners and if people add those options back in later it's their own fault when they get this 'bug'.