Wait, huh? This forum's been available via wicg.io since August 2014? I thought WICG was only founded in July? Did somebody do a find+replace on all the site's history records to replace all instances of
(If so, why wasn't it changed in this thread? I know the name in the title was wrong, but later replies spelled it correctly - they should have resulted in a replacement, too.)
That piece of weirdness aside, this is still an issue, as
wicg.io still serves the same content as
discourse.wicg.io under different domains - apart from cookies not being shared between domains, not having proper redirection for canonicalization hurts search rankings (and is going to break inbound links if/when wicg.io is replaced with a new site having different content).
It also breaks third-party authentication.