buritica

oh.. and paste this in your functions file

<?php
/*
Plugin Name: Category pagination fix
Plugin URI: http://www.htmlremix.com/projects/category-pagination-wordpress-plugin
Description: Fixes 404 page error in pagination of category page while using custom permalink
Version: 2.0
Author: Remiz Rahnas
Author URI: http://www.htmlremix.com

Copyright 2009 Creative common (email: mail@htmlremix.com)

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.

You are allowed to use, change and redistibute without any legal issues. I am not responsible for any damage caused by this program. Use at your own risk
Tested with WordPress 2.7, 2.8.4 only. Works with wp-pagenavi
*/

/**
* This plugin will fix the problem where next/previous of page number buttons are broken on list
* of posts in a category when the custom permalink string is:
* /%category%/%postname%/
* The problem is that with a url like this:
* /categoryname/page/2
* the ‘page’ looks like a post name, not the keyword “page”
*/
function remove_page_from_query_string($query_string)
{
if ($query_string[‘name’] == ‘page’ && isset($query_string[‘page’])) {
unset($query_string[‘name’]);
// ‘page’ in the query_string looks like ‘/2’, so i’m spliting it out
list($delim, $page_index) = split(‘/’, $query_string[‘page’]);
$query_string[‘paged’] = $page_index;
}
return $query_string;
}
// I will kill you if you remove this. I died two days for this line
add_filter(‘request’, ‘remove_page_from_query_string’);

?>