[wp-trac] [WordPress Trac] #15996: Changing permalinks to custom makes all categories return error 404

[WordPress Trac]

#15996: Changing permalinks to custom makes all categories return error 404
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 Reporter:  wpolitika     |      Owner:  Wpolitika
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Permalinks    |    Version:  3.1
 Severity:  major         |   Keywords:  custom permalinks, category, bug
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 Hello,

 I've been struggling with this problem for two days and I can't figure out
 what is wrong. The problem seems to be around for 1-2 months but only now
 have I noticed it.
 I am using WordPress 3.1 RC1, the website we are talking about is
 http://www.notebrother.com.

 The issue goes like this:
 I am using custom permalinks that have the following structure:
 /%year%/%monthnum%/%day%/%postname%/

 All posts work fine with this permalink structure so I suppose this is not
 a .htaccess problem.
 However if I try to access a category archive, let's say
 http://www.site.com/category/news/ I get the following error:

     Error 404 - Not Found

     We're very sorry, but that page doesn't exist or has been moved.
     Please make sure you have the right URL.

 This problem disappears if I revert to the default permalinks. Using
 http://www.site.com/?category_name=news works all the time, regardless of
 what I am doing to the permalinks.

 Also if I want to use %category% in the permalink structure, this will
 make all posts inaccessible, but without an error, the server will simply
 not be able to process the request and act as if it's down.

 I tend to believe this might be due to a bug in version 3.1.

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Ticket URL: <http://core.trac.wordpress.org/ticket/15996>
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