[flexcoders] stage mouseUp not firing outside app window

[graham.t...@rocketmail.com]

In the following example, I've got a stage-level mouseUp listener.  In the 
application window, I can click-drag off-window and, when I release, the 
mouseUp event will fire.

However, if I start my click-drag on the label and release off-screen, I do 
_not_ get the mouseUp event.  

(I think setting mouseChildren=false on thetestContainer resolves the issue for 
this test, but it's not practical for my application.)

Anyone have any ideas?

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"; layout="absolute"
        applicationComplete="onApplicationComplete(event)">
        
        <mx:Script>
                <![CDATA[
                        import mx.events.FlexEvent;
                        
                        private function onApplicationComplete(e:FlexEvent):void
                        {
                                stage.addEventListener(MouseEvent.MOUSE_UP, 
onMouseUp);
                        }
                        
                        private function onMouseUp(e:MouseEvent):void
                        {
                                trace ("onMouseUp fired");
                        }
                ]]>
        </mx:Script>
        
        <mx:Canvas id="testContainer" width="400" height="100" 
backgroundColor="#00ff00">
                <mx:Label text="Click-drag from _label_ to off-window.  
Release.  No mouseUp."/>
        </mx:Canvas>
</mx:Application>