https://xenforo.com/community/ Always wondered what took them so long after the image proxy feature was added. Still not SPDY happy though: http://spdycheck.org/#xenforo.com
Hopefully, now they've done that it'll stop the occasional log out errors when you hit http instead of https.
Poor vbulletin, was the first to go SSL based on a CIO reading something in eweek magazine about it. Then they ditched it when they went to vB5 I believe. #AheadOfItsTime