title: Just upgraded to Django 1.4 and getting error with messages
body: <p>I just upgraded to Django 1.4 and it has broken a couple things including messaging.</p>
  
  <p>Here's the error I get when trying to change a avatar:</p>
  
  <pre><code>'User' object has no attribute 'message_set'
  Exception Location: /Users/nb/Desktop/myenv2/lib/python2.7/site-packages/django/utils/functional.py in inner, line 185
  </code></pre>
  
  <p>Traceback:</p>
  
  <pre><code>File "/Users/nb/Desktop/myenv2/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response
    111.                         response = callback(request, *callback_args, **callback_kwargs)
  File "/Users/nb/Desktop/myenv2/lib/python2.7/site-packages/django/contrib/auth/decorators.py" in _wrapped_view
    20.                 return view_func(request, *args, **kwargs)
  File "/Users/nb/Desktop/spicestore/apps/avatar/views.py" in change
    76.             request.user.message_set.create(
  File "/Users/nb/Desktop/myenv2/lib/python2.7/site-packages/django/utils/functional.py" in inner
    185.         return func(self._wrapped, *args)
  
  Exception Type: AttributeError at /avatar/change/
  Exception Value: 'User' object has no attribute 'message_set'
  </code></pre>
  
  <p>Also, messaging no longer works on the site. What are the changes in Django 1.4 that could be causing this and has anyone overcome a similar issue?</p>