I'm not really too sure how you can't repeat it... it does take a few windows to cause it though. The bug isn't context-based so the Vista version is irrelevent. It's logic based. What you are asking it to do it put the window to the "back" of the stack of windows, then animate it away. This only works with maximised ...

If you set the Vista desktop (i.e. the big window behind all other windows) to Auto Arrange then the icons on your desktop will flow down and, if you have enough of them, in columns towards the right. Make sure there are enough files on your desktop that you have multiple columns. Two columns is enough but three will really make the problem stand ...

In Windows Vista Italian version, some important words are not visible in Windows Color panel: the text is not completely visible and so you don't know if it's selected "ICC" or "sRGB" because these 2 words are invisible (the window size is fixed)  

Hello,  I'm using a Dell XPS and when I connect it to a projector and I toggle my display to show both on my laptop and the projector the desktop icons suddenly get HUGE and overlap each other so much I cannot click on any of them excep the top one.  If you need more info let me know but I can reproduce it easily. It happens ...