IFrame(child container) still visible after closing the title window(parent container)

Question

Hi All ,
I have created a sample project using a link button which when clicked opens up an TitleWindow which has an iframe and a text area in a hbox
When you execute the application ,
          Click the link button
          The Popup window opens up showing the title window with the close button
          Click the close button of the title window
          The Title window is removed and the iframe and the text area are not visible
Do this a couple of times
You can notice that the iframe is still visible even when the title window is closed
Can someone explain me how this issue can be resolved and also explain me why the iframe(child container) is still visible when the title window(parent container) is not visible. 
Main Application file
<?xml version="1.0" encoding="utf-8"?>
<mx:Application
    width="100%" height="100%" creationPolicy="all"
    xmlns:mx="http://www.adobe.com/2006/mxml"
    layout="vertical" creationComplete="init()"
    xmlns:containers="containers.*">
   <mx:Script>
   <![CDATA[
       import mx.managers.PopUpManager;
       import containers.PopUpBrowser;
       public function doRequest():void
                var requestPopup:PopUpBrowser = PopUpManager.createPopUp(this, PopUpBrowser) as PopUpBrowser;
                PopUpManager.addPopUp(requestPopup,this);
                requestPopup.x = 220;
                requestPopup.y = 50;
   ]]>
   </mx:Script>
   <mx:Text fontSize="14" fontWeight="bold" text="Click the link button below to open the Title Window" />
   <mx:Spacer height="100"/>
   <mx:LinkButton label="Click me" fontSize="16" fontWeight="bold" click="doRequest()"/>
</mx:Application>
PopUpBrowser.mxml Component
<?xml version="1.0" encoding="utf-8"?>
<mx:TitleWindow
    xmlns:mx="http://www.adobe.com/2006/mxml"
    close="removeMe()"
    showCloseButton="true"
    styleName="myTitleWindowStyle"
    width="850" height="500"
    title="Klout User Profile"
    paddingTop="1" paddingBottom="1"
    paddingLeft="1" paddingRight="1"
    xmlns:generic="com.serendio.voom.components.generic.*"
    xmlns:flexiframe="http://code.google.com/p/flex-iframe/"
    horizontalScrollPolicy="off"
    verticalScrollPolicy="off" >
    <mx:Script>
        <![CDATA[
            import mx.managers.PopUpManager;
            public function removeMe():void
                PopUpManager.removePopUp(this);
        ]]>
    </mx:Script>
    <mx:HBox width="100%" height="100%">
    <flexiframe:IFrame source="http://www.google.com" id="iFrame" width="50%" height="100%"/>
    <mx:TextArea text="Open and close the title window few times and watch the iframe remain visible even when the title window is closed"
         fontSize="14" width="50%" height="80%"/>
    </mx:HBox>
</mx:TitleWindow>
Thanks,
Ajantha

Answer 1

Hey,
This is working fine for me with the current 4.5 Flex, Firefox 3.6.12, IE8. On what browser you are getting this error.
Thanks,
Jayagopal.