This is not a problem with JFBConnect. Something is incorrectly setting the title on your page. If you look at the HTML on that page, you'll see the following tag:
<title>La jungle de Calais n'a rien perdu de son humanité</title>
I'd disable any SEF extensions or options you have or any other optimization extensions you have enabled.
JFBConnect does not set the meta title tag at all and it is not causing the problem. The issue is that something else is setting the title tag and JFBConnect is using it as well for Facebook.
I hope that helps give you some ideas on where to look,
Alex