Mod_python error: "PythonHandler django.core.handlers.modpython"

Traceback (most recent call last):

  File "/usr/lib64/python2.4/site-packages/mod_python/apache.py", line 299, in HandlerDispatch
    result = object(req)

  File "/home/modarch/django/core/handlers/modpython.py", line 185, in handler
    return ModPythonHandler()(req)

  File "/home/modarch/django/core/handlers/modpython.py", line 154, in __call__
    response = self.get_response(request)

  File "/home/modarch/django/core/handlers/base.py", line 53, in get_response
    response = self._real_get_response(request)

  File "/home/modarch/django/core/handlers/base.py", line 115, in _real_get_response
    return debug.technical_500_response(request, *sys.exc_info())

  File "/home/modarch/django/views/debug.py", line 156, in technical_500_response
    return HttpResponseServerError(t.render(c), mimetype='text/html')

  File "/home/modarch/django/template/__init__.py", line 174, in render
    return self.nodelist.render(context)

  File "/home/modarch/django/template/__init__.py", line 792, in render
    bits.append(self.render_node(node, context))

  File "/home/modarch/django/template/__init__.py", line 810, in render_node
    result = node.render(context)

  File "/home/modarch/django/template/defaulttags.py", line 135, in render
    nodelist.append(node.render(context))

  File "/home/modarch/django/template/defaulttags.py", line 229, in render
    return self.nodelist_true.render(context)

  File "/home/modarch/django/template/__init__.py", line 792, in render
    bits.append(self.render_node(node, context))

  File "/home/modarch/django/template/__init__.py", line 810, in render_node
    result = node.render(context)

  File "/home/modarch/django/template/defaulttags.py", line 229, in render
    return self.nodelist_true.render(context)

  File "/home/modarch/django/template/__init__.py", line 792, in render
    bits.append(self.render_node(node, context))

  File "/home/modarch/django/template/__init__.py", line 820, in render_node
    raise wrapped

TemplateSyntaxError: Caught an exception while rendering: 'utf8' codec can't decode bytes in position 43-44: invalid data

Original Traceback (most recent call last):
  File "/home/modarch/django/template/__init__.py", line 810, in render_node
    result = node.render(context)
  File "/home/modarch/django/template/defaulttags.py", line 135, in render
    nodelist.append(node.render(context))
  File "/home/modarch/django/template/__init__.py", line 846, in render
    return self.filter_expression.resolve(context)
  File "/home/modarch/django/template/__init__.py", line 598, in resolve
    obj = func(obj, *arg_vals)
  File "/home/modarch/django/template/defaultfilters.py", line 25, in _dec
    args[0] = force_unicode(args[0])
  File "/home/modarch/django/utils/encoding.py", line 42, in force_unicode
    s = unicode(s, encoding, errors)
UnicodeDecodeError: 'utf8' codec can't decode bytes in position 43-44: invalid data