title: Django admin, error deleting user
body: <p>I'm trying to delete a user using Django Admin, but I get this error:</p>
  
  <pre><code>TypeError: coercing to Unicode: need string or buffer, User found
  </code></pre>
  
  <p>What could cause this error?</p>
  
  <p>The complete error:</p>
  
  <pre><code>TypeError at /admin/auth/user/
  coercing to Unicode: need string or buffer, User found
  Request Method: POST
  Request URL:    http://www.domain.com/admin/auth/user/
  Exception Type: TypeError
  Exception Value:    
  coercing to Unicode: need string or buffer, User found
  Exception Location: /home/user/webapps/django/lib/python2.5/django/utils/encoding.py in force_unicode, line 71
  </code></pre>