Permalinks – Category Archive not working in WordPress 3.1

After upgrading to the new WordPress 3.1 my category archive (i.g Moblog) stopped working.

It was showing the home page but with the category URL.

After deactivating all the plugins I’ve found it was the Simple Tags Plugin (reported here).

It is a known issue by the plugin developers, let’s hope they’ll fix it soon 😕

17 Responses to “Permalinks – Category Archive not working in WordPress 3.1”

  1. Jexweber February 24, 2011 at 1:29 pm #

    I upgraded WP 3.1 recently and my moblog category works correctly, I don’t use Simple Tags Plugin, I just use Postie plugin.

    • quicoto February 24, 2011 at 2:04 pm #

      Yup, it looks like certain code inside the plugins breaks the permalinks.

      I’m glad it upgraded smoothly for you 😉


  2. Raul February 24, 2011 at 7:29 pm #

    Same problem.
    Thanks for the info same my life 🙂

    • quicoto February 24, 2011 at 7:59 pm #

      I’m glad it helped you 😉

  3. Steven Britton February 26, 2011 at 2:13 am #

    I’m having a similar issue; however, I’m not using the Simple Tags Plugin installed. Basically, my issue is when making a new post in the admin tool, most of the buttons are not firing their respective scripts. For example, I can not make links, insert media, or add new tags. Here’s a screenshot pointing out some of the buttons- when I click, absolutely nothing happens.

    Any help would be much appreciated!


  4. Luke America March 24, 2011 at 5:22 pm #

    If this doesn’t solve your category/tag link list 404’s (pulldown and top level menus) when you have a custom permalink for Blog Posts, try this “action” function. It’s worked on every site I’ve tried (including multi-sites) WITHOUT having to tinker with .htaccess, change the existing permalink structure, or disable any installed plugins.

    The problem is with 3.1’s canonical redirect. Sometimes, just disabling the redirect fixes the pblm. But, if this doesn’t solve it for you, here’s a more extensive alternative hotfix link. Just put the code in your theme’s functions.php file.

    • quicoto March 24, 2011 at 9:08 pm #

      Thanks for the tip Luke 😉

    • Kausik November 15, 2011 at 10:20 am #

      Thanks. This link is useful and resolves my problem.

  5. Luke America March 25, 2011 at 4:37 pm #

    Cool. Hope it helps those who are struggling with this 3.1 upgrade issue.

    BTW, you have some cool code snippets here!

  6. Nicole March 25, 2011 at 11:45 pm #

    hey, I am using the Simple tags Plugin on my other blog, have to check it out

  7. April 5, 2011 at 9:48 am #

    thanks bro.. nice post.. it fix my problem to…

  8. Jay Thompson April 25, 2011 at 7:02 am #

    I was having the same issue with categories on upgrading to WP 3.1. I just upgraded SimpleTags to Version 2.0-beta9 and the problem is resolved!

  9. Jimi May 3, 2011 at 12:35 am #

    This was a great little fix! Thanks man!


  10. Ahsan Rathore September 5, 2011 at 7:06 pm #

    Thanks Luke!

  11. Arya November 17, 2011 at 7:42 pm #

    lol i have break my themes before googling and found your article. I have same problem with you. Now my category work normal

  12. bang kaus April 3, 2012 at 7:42 pm #

    thank you for this info.
    but my categories still not found.
    my permalink is /%postname%/ but suddenly to Common Settings –> Post name:

    Every time i set permalink to /%postname%/ it roll back to Post name: when i save it.

    What should i do?

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