Here is an old website I've done a year back and the facebook comment is suppose to shrink according to the screen width:
http://theupcoming.me/jflo-beatboxer-newyork-upcoming-youtube/
Previously it was working fine, however I visited the site today, noticed the css responsive hacks stop working and the width is default to 550px and the 550px is being set at the facebook server and I can't seem to rewrite the css any longer.
Anyone has a solution for this?