One of the best things about Revenge of the Sith, from a technical standpoint was how they made the CG Yoda's lips stiffer when he talked, so it transitions better to Empire when we get to the puppet. His lips in Empire and Jedi just opened and closed.

Ep2 he had quite the rubbery articulation that just wasn't there with the puppet. Glad Coleman and the SW CG boys caught that.

Wanna see some cool Easter Eggs from ROTS?
The Millenium Falcon was in there indeed.