Custom post type archive limited

[thomask]

as a new feature of custom post types of 3.1 is option to enable custom post type archive using 'has_archive' => true.

Problem is, that this archive page got few limitations

1. it is not possible to add it using Nav menus (except direct Custom link)
2. if using the standard archive.php page, the common function for getting archive page name (e.g. single_tag_title) or description (e.g. tag_description) do not work - the best now is to use get_queried_object()->name resp. get_queried_object()->description

Also it is not obvious, that when you create a custom post type and taxonomy (with public=true) they are not visible on menu navigation page - you must make them visible using the top View menu (it took me a while to realize it)