When a window is maximized, Metacity removes the left/right/bottom border of the window. This is very useful, for example in Firefox or any application with scrollbars, because simply moving the mouse *far-enough* to the right will position it onto the scrollbar. Compiz doesn't remove these window decodations. As a result, moving the mouse to the far right lands it on the window decoration. To scroll, the user needs to delicately position the mouse to the left by 10 pixels. Quite unnecessary IMHO. Compiz SHOULD remove the left/right/bottom window borders for maximized windows.