Issues with map_meta_cap and 0.8.1beta

Since 0.8.1beta the setting map_meta_cap is used in CPT UI and set to false as default value (which is documented as default value in the documentation of register_post_type()).

But setting map_meta_cap to false caused issues with the setting capability_type like e.g. non editable posts of a custom post type post if the post owner is e.g. an editor-role and the current user an admin-role or similar.

If the map_meta_cap setting in CPT UI was removed from the register_post_type() call, the issues disappeared, which lead to the conclusion that the default value for map_meta_cap is actually true and not false.

An annotation in the register_post_type() documentation also points in this direction:

… It seems that map_meta_cap needs to be set to true, to make this work.

Would suggest to use true as default for map_meta_cap in CPT UI or omit the setting from register_post_type() if user has set it to false.

The use of map_meta_cap might also need more investigation…

http://wordpress.org/plugins/custom-post-type-ui/