[Gumbo_Priority] SWF won't run with a resized component whose skin has resizeMode="Scale"

Steps to reproduce:
1. Start with this code:

<Application xmlns="http://ns.adobe.com/mxml/2009">
<Button skinFactory="MySkin" height="50"/>
</Application>

MySkin.mxml:

<?xml version="1.0" encoding="utf-8"?>
<Skin xmlns="http://ns.adobe.com/mxml/2009" resizeMode="Scale">
<states>
<State name="up"/>
<State name="over"/>
<State name="down"/>
<State name="disabled"/>
</states>
<Metadata>[HostComponent("flex.component.Button")]</Metadata>
<Ellipse width="5" height="5">
<fill>
<SolidColor color="0"/>
</fill>
</Ellipse>
</Skin>

2. Compile and run

Actual Results:
Flex loading screen hangs

Expected Results:
Button looks like a stretched-out ellipse.

Workaround (if any):