I believe theres a small problem where the autovalidator is using the enctype default rather than using the upload="true" method. So therefore I have to disable autovalidation on the form so that FILES can be uploaded to the server.
I can see why in the AdminCP that you have Edit Avatar in another screen but this is a hassle for someone like me making a addon.
If you need me to mention more details at to what is wrong I can explain more.
The auto validator uses ajax, which won't send files through anyway -- you have to do a different approach with that, which is why all of our uploaders use separate forms or don't use the auto validator.