I noticed that the format of related content fields on our site had changed. Looked in settings and see this notice;
Fatal error: Cannot use object of type WP_Error as array in /home/admin/public_html/wp-content/plugins/shareaholic/sexy-bookmarks.php on line 220
Deactivated & then reactivated plugin, but no change.
Front end sites (is multi site network ) all working ok, except for this display feature.