id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc
19384	register_taxonomy() doesn't fail (silently or otherwise) when trying to use a reserved term	iamfriendly		"Title says it all really, but here's how I found out:

Registered a custom taxonomy called ""type"" and associated it with a custom post type called 'portfolio'. Worked fine, admin menu appeared, meta box was added to Portfolio CPT screens, everything worked as expected.

Until... I tried to add an image, and then pressed the 'Media Library' tab in the overlay. Even though I had 72 images in my media library, it didn't show any at all. (Not a show-stopper, but pretty annoying). Tracked it down, eventually to the fact that 'type' is a reserved term.

It looks like register_taxonomy() doesn't utilise taxonomy_exists(). I suspect this is because the latter function has only been around since 3.0 whereas the former has been with us since 2.3.

Suggestion: Throw an error if someone tries to overwrite a pre-existing taxonomy. "	defect (bug)	closed	normal		Taxonomy	3.2.1	normal	duplicate