Traceback (most recent call last):

  File "/var/lib/python-support/python2.5/django/core/servers/basehttp.py", line 273, in run
    self.finish_response()

  File "/var/lib/python-support/python2.5/django/core/servers/basehttp.py", line 312, in finish_response
    self.write(data)

  File "/var/lib/python-support/python2.5/django/core/servers/basehttp.py", line 383, in write
    assert type(data) is StringType,"write() argument must be string"

AssertionError: write() argument must be string