Do you think the database was hacked? I would have thought the core vBulletin installation would be SQL injection secure throughout the builds, but i guess there could be some add-ons that is not? I wonder if there is anything in common between the accounts affected, like sign-up date or location.
On another note, should we be re-registering with our original usernames or would re-registering impede the restoration process (if a backup exists and its possible)?
Thanks for looking into it Admins & Co