id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc
20852	Theme Customizer: check for existence and allowed usage of previewed theme	lancewillett	nacin	"Currently Theme Customizer does not check for existence of a given theme based on the {{{theme}}} query variable.

The admin file should throw an error early on if the theme:

 1. Doesn't exist
 2. Isn't allowed for current blog (multisite only)

Patch attached."	defect (bug)	closed	normal	3.4	Appearance		blocker	fixed	has-patch dev-feedback