[Facebook’s guide to sharing] details some meta tags to make that sharing work better:
In order to make sure that the preview is always correctly populated, you should add the tags shown below to your html. An example news story could have the following:
> > As shown, title contains the preview title, description contains the preview summary and image_src contains the preview image. Please make sure that none of the content fields contain any html markup because it will be stripped out. For consistency’s sake, please use the > > <meta /> > tag to provide text data for the preview, and the > > <link /> > tag for any source urls. > > The title and summary tags are the minimum requirements for any preview, so make sure to include these two. : http://www.facebook.com/share_partners.php "Facebook | Share Partners"