id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc
19676	404 Error Pages Do Not Display Custom Navigation Menus	bozzmedia		"When calling wp_nav_menu on a 404 page (404.php) no menus are displayed.  There may be a potential conflict with numbers in URLs.

This is resolved when permalinks are set to
/%category%/%postname%/

Please see: http://wordpress.org/support/topic/custom-menu-not-displaying-on-404-error-page"	defect (bug)	closed	normal		Menus	3.3	normal	worksforme	reporter-feedback