Interesting Loader/DividedBox behavior

[lm7e]

In attempting to utilize the RSL feature, I am designing an 
application that is composed of a wrapper app that in turn loads 
different subsystem apps. This works fine. The interesting behavior 
I have seen is that a subsystem app I have written contains a 
DividedBox and when it is loaded, the cursor does not show the 
proper "move" indicator (->| |<-) that it should when hovering over 
the divider; the cursor disappears. If I open the subsystem app 
separately, the behavior is correct. Any ideas??? Workarounds??? You 
can find code that demonstrates this strangeness below.

Thank you in advance,
Lawrence

---- loaderApp.mxml ----
<?xml version="1.0" encoding="iso-8859-1"?>
<mx:Application xmlns:mx="http://www.macromedia.com/2003/mxml"; 
width="100%" height="100%" xmlns="*">

<mx:XML id="theMenuDataProvider">
<menu label="Test">
<menuitem label="Test App" 
data="testApp.mxml.swf" />
</menu>
</mx:XML>

<mx:Script>
var app : String;

function loadSubsystem(event : Object) {
app = event.menuItem.attributes.data;
}
</mx:Script>

<mx:MenuBar width="100%" id="theMenuBar" 
change="loadSubsystem(event)">
<mx:dataProvider>{theMenuDataProvider}
</mx:dataProvider>
</mx:MenuBar>

<mx:HBox width="100%" height="100%">
<mx:Loader id="applet" source="{app}" 
scaleContent="false" width="100%" height="100%" />
</mx:HBox>

</mx:Application>

---- testApp.mxml ----
<?xml version="1.0" encoding="iso-8859-1"?>
<mx:Application xmlns:mx="http://www.macromedia.com/2003/mxml"; 
width="100%" height="100%">
<mx:Script>
function getPreferredHeight() {
if (_parent != undefined) {
return _parent.layoutHeight;
} else {
return super.getPreferredHeight();
}
}
function getPreferredWidth() {
if (_parent != undefined) {
return _parent.layoutWidth;
} else {
return super.getPreferredWidth();
}
}
</mx:Script>
<mx:Panel width="100%" height="100%">
<mx:DividedBox direction="horizontal" height="100%" 
width="100%">
<mx:Tree id="theTree" width="30%" 
height="100%">
<mx:dataProvider>
<mx:XML>
<node 
label="Something">
<node 
label="Here" isBranch="true">
</node>
<node 
label="There" isBranch="true">
</node>
<node 
label="Anywhere">

<node label="Huh?" />

<node label="What?" />

<node label="Where?" />
</node>
</node>
</mx:XML>
</mx:dataProvider>
</mx:Tree>
<mx:VBox height="100%" width="70%">
<mx:TabNavigator height="100%" 
width="100%">
<mx:Canvas label="Isn't" 
height="100%" width="100%" />
<mx:Canvas label="This" 
height="100%" width="100%" />
<mx:Canvas 
label="Interesting?" height="100%" width="100%" />
</mx:TabNavigator>
</mx:VBox>
</mx:DividedBox>
</mx:Panel>
</mx:Application>