<s:Fade/> - playheadTime - NaN

Steps to Reproduce:

<?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"
initialize="init()">

<fx:Script>
<![CDATA[
private function init():void

{ var tm:Timer = new Timer(40); tm.addEventListener(TimerEvent.TIMER, onTimer); tm.start(); _scale.play(); _fade.play(); }

private function onTimer(event:TimerEvent):void

{ trace(_scale.playheadTime, _fade.playheadTime); }

]]>
</fx:Script>

<fx:Declarations>
<s:Scale id="_scale" target="

{this}" duration="100" startDelay="200"/>
<s:Fade id="_fade" target="{this}

" duration="100" startDelay="200"/>
</fx:Declarations>

</s:Application>

Actual Result:

NaN NaN
54 NaN
85 NaN
138 NaN
177 NaN
223 223
255 255

Expected Result:

NaN NaN
54 54
85 85
138 138
177 177
223 223
255 255