I do not know if this is normal, but I have it two times already. I create a metabox, then I change something. In this case the post type name, and then my metabox disappears.

I am creating Project Categories:

// Project Category type
add_filter('piklist_post_types', 'project_category_post_type');
function project_category_post_type( $post_types )
{
    $post_types['project_category'] = array(
        'labels' => piklist('post_type_labels', 'Project Category')
    ,'public' => true
    ,'rewrite' => array(
            'slug' => 'project_category'
        )
    // etc.

    return $post_types;
}

What I did was to change the ‘project_category’ string in the code above and in the code below. After that change the metabox below did not show when I choose ‘Project Categorie’ -> ‘New’ in the WordPress Admin.

Metabox in parts/meta-boxes:

<?php
/*
Title: Create Project Category
Description: Create a new project category
Post Type: project_category
Collapse: false
*/

piklist('field', array(
    'type' => 'text',
    'field' => 'category',
    'label' => 'Category name',
    'description' => 'The name of the category to group the project items',
    'columns' => 5
));

Someone any clue how to ‘reset’ piklist to recreate the piklist post types and metaboxes?