Viewing single posts of CPT 'author' result in 404 after upgrade

[brianbws]

Everything works fine in a clean install of 3.6.1 with this in functions.php:

add_action( 'init', 'create_custom_post_types' );
function create_custom_post_types() {
    $args = array(
      'public' => true,
      'label'  => 'Authors'
    );
    register_post_type( 'author', $args );
}

But after upgrading to 3.7.1 you can no longer go to a single page without getting a 404 error. This happens with or without permalinks enabled.

Someone else has had the same problem here:
​http://stackoverflow.com/questions/19583960/404-errors-after-update-to-wordpress-3-7

This has affected 2 of my large live sites so hope it can be fixed soon. Thanks!

[ocean90]

Maybe related: #25798

[dd32]

I'm fairly certain this is a wontfix.

This is effectively using the author query var for a CPT, a reserved query var which WordPress uses.

If you don't prefix your post types / query vars, things will break eventually, like has happened here.

[chriscct7]

Invalid per comment:2