Ian,
I'm not seeing anything wrong with that page. Would it be possible to send us super admin credentials so we can get into the site to try to debug the issue?
The only other suggestions I'd have, right now, are to add This email address is being protected from spambots. You need JavaScript enabled to view it. to the notification list, and post a comment. I'll let you know if I get anything. Beyond that, it seems like something is blocking the emails, but I'm not sure what.
You can Private Message me the credentials by clicking the arrow under my picture (<----) and hitting the mail icon.
Thanks,
Alex