lukaszb/django-guardian — pull request #188 by moemen (2013-12-31 11:29:48+00:00)
Title: UserObjectPermissionManager.get_for_object return queryset based on object

get_for_object method in UserObjectPermissionManager and GroupObjectPermissionManager was filtering only on content type and user/group. that make query for model not for object.
I changed it to add filtering with object pk, too.