The new “Aero” interface on Vista and Windows 7 displays an animation sequence each time you hide or minimize a window. This can get a little distracting when you are using WindowTabs because this animation is triggered each time you switch between windows in a tab group. Fortunately, you can turn of this animation, here is the menu sequence:

Computer -> Properties -> Advanced System Settings -> Performance -> Visual Effects -> “Animate windows when minimizing and maximizing”