When WinXP opens a new window, the icon/button that gets created in the taskbar does this stupid expansion animation thing. Is there any way to turn that off so that the icon/button just pops into existence? It doesn't seem to be under Control Panel → Display Properties → Appearance → Effects.

The reason I ask is that I have a virtual desktop app that gets bogged down on this slow computer I'm using when Windows redraws the icons/buttons that it adds and removes on desktop switching.