We haven't been able to get hold of your old avatars, thus, some of your avatars are now showing up if you didn't upload them after the forum move. Seeing how half of the regular members already uploaded their avatars, probably it's just better for everyone to upload the avatars.
… So yeah, please upload them on your own ^^ Since remote upload (upload from other URL) is disabled, please save your avatar on your local machine and upload it.
Same applies to smileys, but that'll be taken care of sometime this week.