Here're the images:
Image from 2004 Howard Dean campaign rally.
Image from Bret Schundler's website.
The two images superimposed, with Schundler's image partially transparent on top.
I'll leave it up to you, my fair reader, to play the "find the changes" game. It's hours of endless fun!
Via the Democratic Underground (on their front page; the article doesn't have a permalink).
p.s. If you're confused by the title, see my Yakuza post, as well as this post.