Minimize App. changes Vertical orientation to Horizontal

This should be simple:

If I have the tiles arranged vertically, and then I minimize the application, when I restore the app, the tiles are now arranged horizontally...annoying but at least its easy to recover from.

FYI, although this may not matter, I am using W2K with a dual monitor system with a G400 matrox card.

I have been unable to reproduce this bug. I'll keep trying and post any repeatable results I find.