Matthew, thanks for reporting much appreciated.
There will no doubt be some burning-in to do given the major rework of the URL structure of the new docs site. We have an htaccess file performing most of the redirections that Ingo (@chillu) created so it looks like even with best efforts this one has perhaps not had a redirect put in place.
We had a pull request to correct some of the redirects from the community yesterday which was great to see (and I'm keen to rapidly deploy improvements as they come through pull requests and get merged).
I'll check in with you once I get into the office incase you had already started some work on this, if you haven't I'll get on it.