line 609 of wp-db-backup.php seems to cause a message to appear in site admin and dashboard for non administrators when debug=true is set in config.php.
message is "Notice: Trying to get property of non-object in http://...domainname.../wp-admin/includes/template.php on line 1858"
commenting out line 609 stops the message but I don't know if this affects the behaviour of wp-db-backup. Does this just inhibit the help text?