There seems to be a mismatch as to how admin model URLs are constructed in magic-removal; as a result, log entries in the admin interface currently do not point to the valid URL path for their corresponding items.
In contrib/admin/templatetags/adminapplist.py, admin_url is built in the singular in the render method of AdminApplistNode:
'admin_url': '%s/%s/' % (app_label, m.__name__.lower()),
In contrib/admin/models.py, such a URL is built with pluralization in the get_admin_url method of LogEntry:
return "%s/%s/%s/" % (self.get_content_type().get_package(), self.get_content_type().python_module_name, self.object_id)
python_module_name, in turn, is originally constructed in db/models/options.py with the following:
get_module_name = lambda class_name: class_name.lower() + 's'
As I'm not certain which is intended as the final case (singular vs. plural), I have refrained from attempting a fix; I'll gladly work up a patch once I know which way this should go.