I'm getting the same message. But to help you narrow it down some, it only happens after I log in, so it has something to do with the live stream of WWI. When visiting as a guest or a normal patron, the front page is fine.
it does that to me to; where you log in and it says ur logged in, but then it show the username bar empty. going to the forums it shows you logged in, so you are logged in anyways even if it says you're not.