MouseMove events unexpectedly stop functioning

(TechNote) In an ActionScript 3 (AS3) Flash Player movie (SWF), mouseMove events assigned to display objects stop firing when the mouse moves off the display object to which it was assigned. If you drag a display object using the mouseMove event, the mouseMove event may stop functioning if you move the mouse too fast, preventing the object from being dragged until the mouse is moved back over the object.