The customer centre pages don't seem to be working properly. I can (sometimes) get to the main page that lists the account balance and such, but clicking almost any other links gets you, after a long delay: "We're sorry. There seems to be something wrong. Click back to go to your previous page."
(A really terrible error message by the way.. it should give some hint of what you can do to fix the problem, or just tell you the site is broken and to try again later.)