Sure,
Edit the /plugins/jfbcprofiles/jomsocial/jomsocial.php file. At line 200, you'll see:
$fbStatus = $response['data'][0]['message'];
Add the following around it:
if (isset($response['data'][0]))
$fbStatus = $response['data'][0]['message'];
else
$fbStatus = "";
While you're in that file, I also want to post another bug that was found in a different thread that you can correct at the same time. Depending on how you've configured the JomSocial plugin, this may, or may not, affect you:
www.sourcecoast.com/forums/topic?id=2091&p=1#p9572
Sorry for the troubles, and please let us know if this helps you move forward a little better!