id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
23268	Fixtures: Natural Key support for Generic Foreign Keys	Anshuman Aggarwal		"Currently, the natural key support is incomplete when it comes to generic foreign keys (I say bug, you may think feature). One cannot remove PKs from any object that has a generic foreign key reference limiting the whole idea of having natural keys to direct foreign keys only. Since generic foreign keys can inherently have an entry with any model, PKs have to be dumped for all models necessitating the maintenance of updated PKs

There is a great answer by someone who has done the leg work for figuring out what is required. 
http://stackoverflow.com/questions/11159377/is-it-possible-to-use-a-natural-key-for-a-genericforeignkey-in-django

Creating a ticket to document it here and see what the interest is for the same."	Bug	new	Core (Serialization)	1.6	Normal		natural generic fixtures	dev@… Ian Foote	Accepted	1	0	0	1	0	0