Intermittent Screen Layout Problem

I have an intermittent problem, so far reported by only a few users on Win XP and Mac systems.  Basically, I have a bunch of components inside a VBox, and the VBox is inside a WindowedApplication.  What's happening is that for just these few people, the VBox doesn't fill the window (it's height and width are set to 100%).  No clue why that is happening, or even what to play with to try to fix it.  I can't duplicate it on my machine and the app is huge, so I can't give you code, I need some things to try.

One thing I did try after reading through the forums was adding this line to the window:

addedToStage="event.currentTarget.stage.scaleMode = StageScaleMode.SHOW_ALL"

That actually causes a similar behavior where the VBox doesn't fill the window.  May or may not be related, but I thought I'd mention it.

Here is a screen shot of what goes on:

The app is in Beta and can be downloaded here by registering:

http://www.cnccookbook.com/CCGWizardE.html

There are various screen shots of what it's supposed to look like there too.

Any thoughts appreciated.

Best,

BW