MouseEvent.ROLL_OVER + MouseEvent.ROLL_OUT does not trigger an "out" event when moving from a parent to its descendant. Unlike MOUSE_OVER + MOUSE_OUT, the event doesn't bubble.addEventListener(MouseEvent.ROLL_OVER, overHandler, true);MouseEvent.ROLL_OVER + MouseEvent.ROLL_OUT does not trigger an "out" event when moving from a parent to its descendant. Unlike MOUSE_OVER + MOUSE_OUT, the event doesn't bubble.addEventListener(MouseEvent.ROLL_OVER, overHandler, true);