I have tried many different FB like plug-in all are throwing errors of type "Your page's type requires a meta tag of the form <meta property="og:image" ...> to be present."
However, when i look at the page source the og:image tag is present..
Did a lot of experimenting, also found that the error is get generated only on page with embedded images not others. e.g. this page works fine : http://fotohobbist.com/blog/2011/06/19/this-is-my-first-blog-from-my-very-own-blog-site/