Even with an extremely basic model, the django-taggit submodule was not working. I'm not even sure if this was tested before merging.
taggit = TaggableManager()
TwigTest.objects.filter(taggit__name = 'dell')
FieldError: Cannot resolve keyword 'tagged_items' into field. Choices are: id, taggit, twigtest_tagged_items
Took a look around a few links gave no certain solutions, so I managed to fix it by commenting out TaggableManager.extra_filters() in manage.py.
Take it with a grain of salt, because I have no idea what I may have broken by doing this.