Different lazy loading for meta boxes

The lazy loading part for metabox is incorrect and was wondering if that can be changed. It should be listen to the action ‘add_meta_boxes’ and from there you can require class-metabox.php and when needed admin/class-opengraph-admin.php.

Currently this breaks plugins like one of mine: Tabify Edit Screen. Since it will use the hook ‘add_meta_boxes’ to retrieve all metaboxes.

http://wordpress.org/extend/plugins/wordpress-seo/