Glad to hear it. Could have been a Tuesday gremlin. Facebook makes 'major' changes to their Javascript library on Tuesdays, and minor updates constantly. It's possible some major change affected your site, but was fixed quickly after other sites experienced the same problem.
Either way, should you run into anything else or have any other feedback, just let me know.
Finally, if you haven't already, please consider leaving a rating and review for JFBConnect, or our support, on the Joomla Extension Directory. It certainly isn't required, but is very appreciated:
extensions.joomla.org/extensions/social-...ook-integration/7215
Thanks,
Alex