My instinct tells me that there may be something wrong with the classmethod normalize_username in _create_user method.
What Matias suggested works. -- You received this message because you are subscribed to the Google Groups "Django users" group. To unsubscribe from this group and stop receiving emails from it, send an email to django-users+unsubscr...@googlegroups.com. To post to this group, send email to django-users@googlegroups.com. Visit this group at https://groups.google.com/group/django-users. To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/6a37ad93-42b1-4595-9839-72148f42829f%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
