Hi, I'm having an issue with the built-in options for Facebook and Twitter registration. When clicked, they just bring up a 404 page. You can try them on my site here: http://forums.exophase.com/ I'm running nginx 1.4.7 and PHP 5.5. My first guess at the culprit was the rewrite settings for nginx - but they match what's mentioned on the XF help page. Here's the error I see in raw server logs, nothing is generated on the XF side. I removed some data from the link. Any help is appreciated.