Font Awesome Icons
Just a heads up that your link to the fa icons http://fontawesome.io/icons/ is taking people to the new version and all the fa-xyz-names have changed. I've just spent an hour messing with my site, refreshing, clearing caches, etc. Only to realise that I needed to use the names as per the old version of fa icons here https://fontawesome.com/v4.7.0/icons/
You might consider either updating the version wp-foro is using, or change the link to the old version.
We're already working on this. The next 1.4.6 wpForo version comes with Font Awesome 5 lib.