[flexcoders] Shouldn't this VBox have a scrollbar?

[Tom Bray]

Shouldn't the height of the VBox below end up being 300?  Shouldn't  
height="100%" make it fill up the area allotted to it by it's  
parent?  Instead it ends up having a height of 612 and no scrollbar:

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml";  
layout="absolute" horizontalScrollPolicy="off"  
verticalScrollPolicy="off">
	<mx:Canvas width="500" height="300" horizontalScrollPolicy="off"  
verticalScrollPolicy="off">
                <mx:VBox id="badVBox" width="100%" height="100%">
                        <mx:Canvas width="100%" height="200" 
backgroundColor="green"/>
                        <mx:Canvas width="100%" height="200" 
backgroundColor="green"/>
                        <mx:Canvas width="100%" height="200" 
backgroundColor="green"/>
                </mx:VBox>
        </mx:Canvas>
        
        <mx:Button y="400" label="debug" click="debug()"/>
        
        <mx:Script>
                <![CDATA[
                        public function debug():void
                        {
                                var v:VBox = badVBox;
                        }
                ]]>
        </mx:Script>
</mx:Application>