According to Political Wire he did.

Richardson turned from his brand of “nice guy, no attack” politics to, well, attacking his Democratic opponents this week by taking an Iraq position as far out as possible. The problem? While attacking the other candidates position he forgot that he himself once held similar beliefs and so his staff began working hard to white wash any and all references to said position off his site.

Check out the evidence from the New Republic.

Cue Google cache.