- Related content: on sites upgraded from the old theme, related links that previously appeared only in the sidebar are now moved into the Related box on the first admin page load, where they can be edited as normal.
- Related content: teams can be selected in the Related box again.
- Header and footer background images: if an image in the Customiser gallery has been deleted from the Media Library, it is now skipped. Before, a deleted image could be picked at random, leaving the header or footer with no image on some page loads.
- Header image detection now ignores deleted gallery images when setting the navigation overlay and the has-header-image body class.
