Rich, of course we have a suggestion.. and it should be pretty simple.
In the /plugins/content/jfbccontent.php file, at line 192 is where we set the URL for the Like/Comment. Change that to:
$url = 'http://yourdomain.com' . $url;
Check the output in the HTML to make sure it's the right URL, and you should be good to go!
Finally, we know you've been a long-time subscriber and we really, really appreciate that. If you haven't already, we'd love it if you'd consider leaving a review of your experiences with JFBConnect on the JED:
extensions.joomla.org/extensions/social-...ook-integration/7215
Thanks again, and hope this helps!