V5: What I've been working on recently
(Let me know if you get any errors out of it. I'm aware of two issues at the moment: one, that ads don't load in IE; and two, that sometimes a page displays a generic 'something went wrong' message which goes away when you refresh. I'm fairly sure the second is something to do with an idle timeout somewhere because it only happens after nobody's touched the pages for a bit).
More to come.
EDIT: Here's another one.