experimental/amd64/livecd/livecd-amd64-2004.0-rc1-20040201.iso.md5 contains the md5 sum for livecd-amd64-2004.0-rc1-20040124.iso. I checked this on oregonstate, indiana university, and ibiblio, so it seems like it's not just a mirror sync issue.
actually, it's the proper md5 sum, just the wrong filename, it was named with the wrong date... -Brad