Oh Talis is working on it I believe. Something happened with the update and item codes. If I remember correctly the old item codes would be four digits like :0000 for jellopy and the new item codes are more digits, so if it's an old item (from the four digit code time) the item doesn't work.
I think it was soemthing like that. tl;dr something is fubar in the number, they're trying to figure out an alternative.