Text does not look disabled with a selected, disabled checkbox

Steps to reproduce:
1. Compile & run the attached code:
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns="http://ns.adobe.com/mxml/2009"
xmlns:mx="library:adobe/flex/halo"
layout="vertical">

<CheckBox id="checkBox1" label="CheckBox (deselected, enabled)" enabled="true" />
<CheckBox id="checkBox2" label="CheckBox (deselected, disabled)" enabled="false" />

<CheckBox id="checkBox3" label="CheckBox (selected, enabled)" enabled="true" selected="true" />
<CheckBox id="checkBox4" label="CheckBox (selected, disabled)" enabled="false" selected="true" />

</mx:Application>

Actual Results:
selected, disabled CheckBox does not show text as disabled.

Expected Results:
selected, disabled CheckBox shows text as disabled.

Workaround (if any):