Forwarded message error

Forwarding a message causes a TypeError in the email.attach (or email.attach_file) call (provided by django itself[1]).

[1] http://docs.djangoproject.com/en/dev/topics/email/

Traceback:
Environment:

Request Method: POST
Request URL: http://localhost:8000/sendmail/
Django Version: 1.1 pre-alpha SVN-9692
Python Version: 2.5.2
Installed Applications:
['django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.sites',
 'enchanted.webmail']
Installed Middleware:
('django.middleware.common.CommonMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.middleware.doc.XViewMiddleware')

Traceback:
File "/var/lib/python-support/python2.5/django/core/handlers/base.py" in get_response
  86. response = callback(request, *callback_args, **callback_kwargs)
File "/var/lib/python-support/python2.5/django/contrib/auth/decorators.py" in __call__
  67. return self.view_func(request, *args, **kwargs)
File "/home/lorenzo/projects/enchanted/../enchanted/webmail/sendviews.py" in sendmail
  211. return _sendmail(request, fwd_message)
File "/home/lorenzo/projects/enchanted/../enchanted/webmail/sendviews.py" in _sendmail
  296. email.send()
File "/var/lib/python-support/python2.5/django/core/mail.py" in send
  275. return self.get_connection(fail_silently).send_messages([self])
File "/var/lib/python-support/python2.5/django/core/mail.py" in send_messages
  172. sent = self._send(message)
File "/var/lib/python-support/python2.5/django/core/mail.py" in _send
  186. email_message.message().as_string())
File "/usr/lib/python2.5/email/message.py" in as_string
  131. g.flatten(self, unixfrom=unixfrom)
File "/usr/lib/python2.5/email/generator.py" in flatten
  84. self._write(msg)
File "/usr/lib/python2.5/email/generator.py" in _write
  109. self._dispatch(msg)
File "/usr/lib/python2.5/email/generator.py" in _dispatch
  135. meth(msg)
File "/usr/lib/python2.5/email/generator.py" in _handle_multipart
  201. g.flatten(part, unixfrom=False)
File "/usr/lib/python2.5/email/generator.py" in flatten
  84. self._write(msg)
File "/usr/lib/python2.5/email/generator.py" in _write
  109. self._dispatch(msg)
File "/usr/lib/python2.5/email/generator.py" in _dispatch
  135. meth(msg)
File "/usr/lib/python2.5/email/generator.py" in _handle_message
  266. g.flatten(msg.get_payload(0), unixfrom=False)
File "/usr/lib/python2.5/email/message.py" in get_payload
  185. raise TypeError('Expected list, got %s' % type(self._payload))

Exception Type: TypeError at /sendmail/
Exception Value: Expected list, got <type 'str'>