I think it would be something to do with the changes. I've tried re-uploading it but have gotten errors. I believe that with the move something happened with the newsletters. If you are desperate for the set (I will send out the SET only. It's about 1MB in size) send me a PM and I can email it to you.

Right now that's my quick solution for it. If you don't mind waiting, I'm sure JupiterMedia will have things resolved in a few days.