Hello. I like the plugin but have just discovered this issue when hitting a 'Page not found' 404 page on our site:
Notice: Trying to get property of non-object in /home8/amysciar/public_html/atom/wp-content/plugins/wp-facebook-open-graph-protocol/wp-facebook-ogp.php on line 155
The site is on a dev server right now. Launching in a week or so.
What to do?