Spark TitleWindow title is waay too close to the close button

Found in 4.0.0.11073

Steps to reproduce:
1. Compile and run attached MXML file.
2. Mouse over the close button.
3. Observe how close the right edge of the TitleWindow title is to the border of the close button.

Actual Results:
The close button pretty much touches the text.

Expected Results:
The margin between the title and the close button should be roughly similar to the border between the left edge of the TitleWindow container and the left edge of the text (6-8px?)

Workaround (if any):
(a) Custom skin and tweak spacing.
(b) Specify an explicit width on the TitleWindow container.

<?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">

<s:TitleWindow id="ttlWndw" title="Spark TitleWindow title" horizontalCenter="0" verticalCenter="0">
</s:TitleWindow>

</s:Application>