Traceback (most recent call last):

 File "/home/filmaster/django-trunk/django/core/handlers/base.py", line 92, in get_response
   response = callback(request, *callback_args, **callback_kwargs)

 File "/home/filmaster/film20/film20/core/person_views.py", line 153, in show_person
   if processed_rating_form.is_valid():

AttributeError: 'NoneType' object has no attribute 'is_valid'