Facebook unable to download og:image and other meta information

I have an issue that has been very intermittent, but now it’s happening all the time. The issue is that facebook isn’t able to download the og:image or any other of the og meta data, such as title, description, etc. This seems to only happen on single post pages and archives. When you attempt to paste the url of a post page into the facebook status box, the only thing that shows is the URL.

Here is an example post that has the same issue:

http://www.geekmagazine.org/2013/02/09/leatherman-skeletool-giveaway/

I’m running the following:

WordPress 3.5.1
Yoast WordPress SEO 1.3.4.4

Any idea what’s wrong?

http://wordpress.org/extend/plugins/wordpress-seo/