Just remembered something: When I updated All in One SEO on July 12, I did a database backup and scheduled weekly backups to be emailed. On the 19th, the backup for Hollywood Gothique showed up, but no backup for Cinefantastique.
When I noticed the problem today, before attempting any fixes, I tried to backup the database with WordPress Database Backup plugin, but it was a no-go. First time, it stopped backin up after 12%; second time it didn’t get past 1%.