In another post he wrote
For those of you who may have missed the threads I posted on Wednesday - we have moved the forum to a new server in a different location.
Ultimately this will mean a more stable performance, but the move was complex and there are obviously some teething problems. We're working on it, and we'll have things running smoothly as soon as possible. It can take up to 24 hours for the Domain name databases around the world to propagate a new DNS, and in the meantime you'll notice a different url being called when you log in.
Tomorrow is another day.