I believe you have JFBConnect setup. However, some *other* extension is improperly setting the og:image tag. This is the surrounding code in your HTML:
<script type="text/javascript" src="http://s7.addthis.com/js/250/addthis_widget.js#pubid=ra-4e28478872cf0d03"></script>
<meta property="og:image" content=""/>
<!--[if lte IE 7]>
From that, I'd guess it's your AddThis widget, but I don't know. Whatever if adding that incorrect og:image tag will need to be fixed. It's not JFBConnect though.
JFBConnect is not setting any Open Graph tags on that page because you don't have the JFBCSystem plugin enabled. That plugin is required for all of JFBConnect's functionality, including Open Graph tags.
I hope that helps,
Alex