[wp-trac] [WordPress Trac] #17593: tag intersection searches e.g. /tag/foo+bar broken using default permalinks not custom

[WordPress Trac]

#17593: tag intersection searches e.g. /tag/foo+bar broken using default permalinks
not custom
--------------------------+-----------------------------
 Reporter:  polins        |      Owner:
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Query         |    Version:  3.1.2
 Severity:  normal        |   Keywords:
--------------------------+-----------------------------
 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

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Ticket URL: <http://core.trac.wordpress.org/ticket/17593>
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