When I try to share a blog post such as http://www.cnx-software.com/2011/12/20/nvidia-announces-carma-tegra-3-cuda-development-kit/, Facebook will not be able to retrieve the title and picture of the post and it will look as follows: Any reason for this? Do I need to change something in my blog ? I suppose the text and picture of the blog may be to far from the top of the page.