id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc
17593	tag intersection searches e.g. /tag/foo+bar broken using default permalinks not custom	polins		"Tag intersection (=and) searches broken:

http://site.com/tag/foo+bar resturns the correct result only with custom permalinks setting, not the default.  
The default permalinks result in ALL posts being returned, regardless of assigned tag.

However, http://site.com/?tag=foo+bar does work correctly.

Also:

http://site.com/tag/foo+nonexistenttag returns ALL posts regardless of tag, again, only with the default permalink settings.
(I'm guessing that the latter issue will be addressed at WP 3.2 via Ticket #17194?)

Setup:  WP 3.1.2, 2010 1.2 theme, no plugins"	defect (bug)	closed	normal		Query	3.1.2	normal	invalid