Only the generic avatars are showing for most people. When I converted the board (from phpBB 3) in test* they all showed generic* but then I did something that made all the original avatars to render properly. I can't for the life of me remember what I did to fix it. I tried running "Rebuild avatar thumbnails"* but that didn't fix it.
The only thing differently when I reran the import was that I specified the upload folder for the avatars. This seemed to work for just a few of the people who have uploaded their avatars (not everyone)* but I hope this didn't screw up the avatars for the other 98% of people.