Custom Post Types & Pagination

I came across a small issue earlier in the week where we had a website using custom post types but the pagination was not working correctly. Every time you went past the 2nd page, you would get a 404 page not found error. It seems that WordPress 3.0 and custom post types are not working so great however there is a small fix to get around this issue.

The trick is to wrap the code with an add_filter and function. Like so:

if (taxonomy_exists($wp_query->query_vars['taxonomy'])) {
	add_filter('pre_get_posts', 'postcount_filter');
	function postcount_filter($wp_query) {
		$type = 'post_type';
		$paged = (get_query_var('paged')) ? get_query_var('paged') : 1;
		$args=array(
		'post_type' => $type,
 		'post_status' => 'publish',
		'paged' => $paged
		);
		$wp_query->query($args);
	}
}