<mx:Application 
        xmlns:mx="http://www.adobe.com/2006/mxml"; 
        width="640" 
        height="480"
        >
        <mx:VBox top="100" bottom="10" horizontalCenter="0" width="90%" 
horizontalAlign="left" verticalGap="5" id="debugWinVB_ID">
        </mx:VBox>
</mx:Application>


At the start of the application the VBox height is 370 (Application.height - 
vbox.top - vbox.bottom) -> Correct.

Child labels are added to this vbox in runtime and as soon as the cumulative 
labels height becomes > 370 the vbox expands and scroll bars appear @ the 
Application level...Why? 

Should not the Vbox remain @ 370 height and display inner scrollbars, according 
to the following rule:?

    * Component size determined by a pair of constraint-based layout properties 
(left-right or top-bottom) overrides any explicit or percentage-based size 
specifications. For example, if you specify both left and right constraints, 
the calculated constraint-based width overrides the width set by a width or 
percentWidth property.


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