I just started up the game launcher and saw that the "Troll Trouble" DLC is free if you register the game. If I try to register through the launcher menu, I get this error:
Connection error. Try again later.
I also tried to register through the website, but both the Register and Login links in the top-right of the web page appear to be dead. (If you view source, the CSS class is "inactive".)
Is there any way I can work around this?
Edit: Now I get the following error:
A connection with the server could not be established.
So it definitely seems to be due to the work they're doing for the patch.