id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc
4499	Equality checks in query.php can break permalinks	agharbeia	markjaquith	"According to this http://wordpress.org/support/topic/122702, 
there is bug in the way WP 2.2 handles permalinks consisting only of date/time elements.

The blog in which the problem manifests uses the permalink structure /%year%/%monthnum%/%day%/%hour%%minute%%second%

In this case WP fails to uniquely identify a post whose %hour% permalink tag resolves to '''zero''', and resorts instead to displaying the archive page for the calendar day in which the post referred to by the permalink was published, which in turn means that is_single() will always resolve to false and that no single post page can ever be obtained.

Posts having anything other than zero in their %hour% of publication will resolve normally.

Please note that unlike some people might first assume, this permalink structure worked in versions before 2.2. WordPress was indeed able to handle permalink structures which do not have neither %post_id% nor %postname%"	defect (bug)	closed	high	2.3	General	2.2	major	fixed	has-patch