Each menu item is simply a post as far as I know. My Nav Menu Roles plugin saves its information about what user role is allowed to see each nav menu item as post meta.
It has come to my attention that the settings aren't there after exporting and importing. I've checked and the data is in the XML on the export. However, the data is not in the DB after import.
What could cause the import of post meta to fail (it a single field _nav_menu_roles and is saved as an array) ? Any ideas on how I can fix this?