Hi,
Try changing this:
HTML Code:
<meta property="og:image" content="http://<?php echo $_SERVER['HTTP_HOST']; ?>[product.image tag='0']" />
<meta property="og:title" content="[product.name]" />
To this:
HTML Code:
<meta property="og:image" content="[product.image tag='0' direct='1']" />
<meta property="og:title" content="[product.name]" />
<meta property="og:description" content="[product.description]" />
Eric