Excellent add-on. I've been using it for a week, haven't found any bugs. Work's as expected.
Since there is an option of "required" to upload avatar during registration, now every new member always uploads an avatar. The forum looks a lot better now since every memeber has a different avatar and not a forum full of the default avatar.
It is working so far, only did some quick test. Removed the "required" by default tick. Good Job! Maybe you can remove some text below the upload button, my board should be as simple as possible, too much to read :- ))