Spark disabled skin for Halo CheckBox no longer gets enabled after SVN 9148

Steps to reproduce:
1. Compile & run:
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/halo"
minWidth="1024" minHeight="768" >
<s:layout>
<s:VerticalLayout/>
</s:layout>
<mx:CheckBox id="cb" enabled="false" label="Disabled CheckBox" disabledColor="0xFF0000" />
<mx:Button click="cb.enabled=!cb.enabled"/>
</s:Application>
2. Toggle the checkbox enabled

Actual Results:
Checkbox never gets enabled visually even though you can select the checkbox and the text color turns back to black

Expected Results:
Checkbox should get enabled visually

Workaround (if any):