Django 1.4 and Sentry - Timezone Error

gistfile1.sh

[09/Jan/2012 15:57:26] "GET /sasdfasdf HTTP/1.1" 500 59
Unable to process log entry: can't subtract offset-naive and offset-aware datetimes
Traceback (most recent call last):
  File "/home/victorhooi/.virtualenvs/aegnexus/src/sentry/sentry/manager.py", line 322, in from_kwargs
    group, is_new, is_sample = self._create_group(event, **group_kwargs)
  File "/home/victorhooi/.virtualenvs/aegnexus/src/sentry/sentry/manager.py", line 366, in _create_group
    silence_timedelta = date - group.last_seen
TypeError: can't subtract offset-naive and offset-aware datetimes
Traceback (most recent call last):
  File "/usr/lib/python2.7/wsgiref/handlers.py", line 85, in run
    self.result = application(self.environ, self.start_response)
  File "/home/victorhooi/.virtualenvs/aegnexus/src/django/django/core/handlers/wsgi.py", line 241, in __call__
    response = self.get_response(request)
  File "/home/victorhooi/.virtualenvs/aegnexus/src/django/django/core/handlers/base.py", line 153, in get_response
    response = self.handle_uncaught_exception(request, resolver, sys.exc_info())
  File "/home/victorhooi/.virtualenvs/aegnexus/src/django/django/core/handlers/base.py", line 228, in handle_uncaught_exception
    return callback(request, **param_dict)
  File "/home/victorhooi/.virtualenvs/aegnexus/src/django/django/utils/decorators.py", line 91, in _wrapped_view
    response = view_func(request, *args, **kwargs)
  File "/home/victorhooi/.virtualenvs/aegnexus/src/django/django/views/defaults.py", line 32, in server_error
    t = loader.get_template(template_name) # You need to create a 500.html template.
  File "/home/victorhooi/.virtualenvs/aegnexus/src/django/django/template/loader.py", line 145, in get_template
    template, origin = find_template(template_name)
  File "/home/victorhooi/.virtualenvs/aegnexus/src/django/django/template/loader.py", line 138, in find_template
    raise TemplateDoesNotExist(name)
TemplateDoesNotExist: 500.html