Windows 7 issue with Ribbon Window

Hi,

We encountered the following issue on Windows 7 that we were able to reproduce with a simple ribbon window app:

Create a WPF app where a ribbon window is set as the StartupUri.
Build and run the app.
When the ribbon window displays grab the title bar and drag to the top of the desktop to maximize the window.
Grab the title bar and drag the window down to restore the previous size.

At this point, the mouse cursor is no longer over the title bar. If you switch the StartupUri to launch a regular WPF window and perform these steps the mouse retains its position over the title bar. In fact, it appears the window is resized relative to this position whereas the ribbon window does not. That is, the in the case of the ribbon window, the mouse actually stays where it was and the ribbon window is resized and repositioned such that it is moved away from the mouse.

Is this issue a bug or expected behavior? If it is a bug, is it a known issue and when is a fix anticipated to be released?

Thank you for your assistance!