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,,