There are two ways to upload an avatar: by url (e.g. linking it to your photobucket account) or actually uploading the file.
For some reason, the file-uploaded avatars did not transfer to the new site. I did transfer the entire directory, but the phpbb code is not picking it up and displaying it.
The avatars that you see currently are either uploaded by url, or the individual user has re-uploaded it since the move.
I just thought I'd mention it, in case some of you are waiting for us to do something about avatars. As far as I know, no one is working on that, and I don't have any ideas. So - if your avatar isn't showing up, you need to re-upload it.