Hey guys, it's Katie.
I believe I have found a way around the current chat problems. The web address http://preview.walkingdead.wikia.com/wiki/Special:Chat has been working for myself. It also works in a similar way for Community Central chat. Simply add 'preview.' before the walkingdead part of the chat web address.
I posted this here so everyone could see it, as many do not use the forums. Admins, deal with this as you will.
(I hope this works...)