divio/django-cms — pull request #1499 by webdevelop (2012-11-03 19:53:53+00:00)
Title: Removed pages from navigation and url_path if in_navigation is set to False

Well, i don't know is it okay, or not, but on my opinion, if you set in_navigation to False in parent page, you shouldn't see link on it in breadcrumbs, and parent slug should not appears in url path.