Leopard video preview in the dock?

[cgfour]

I have not been able to get video previews to work when a window is minimize to the dock. I thought it was a nice touch to the operating system. Shame.

 

[stewacide]

Live window previews seem to be gone entirely

It seems the Dock is using a new, higher-quality scaling system (much sharper/clearer than before), but in the process live updating was sacrificed.