Just to say that I found a bug in a early version of this library, when you try to upload a picture that includes the symbol '#' in the file name. For example:

Photo on 2012-04-05 at 15.56 #3.jpg

These kind of file names are typical when using MacBook webcams.

So, I solved that using slugify() with the file name, in order to avoid strange characters. Something like:

# avatar/views.py
def add(...):
    # ...
    file_name = os.path.splitext(image_file.name)
    name = file_name[0]
    extension = file_name[1]
    new_file_name = slugify(name) + extension
    avatar.avatar.save(new_file_name, image_file)
    # ...