id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc
15065	Introduce register_theme_update_hook()	ericmann		"Currently, theme authors overload the activation hook with routines for upgrading from older versions.

We should have a dedicated hook for when themes are upgraded.

The activation hook should only be fired when the theme is activated by the user.

Related: [http://core.trac.wordpress.org/ticket/14912 14912]"	enhancement	closed	normal		Upgrade/Install	3.1	normal	wontfix