How to tag a photo to be used as a thumbnail when a page is linked to on Facebook

Question

When a person posts a link on Facebook, Facebook automatically finds a photo to be used as a thumbnail that shows up in the news feed. Is there some sort of (HTML) markup to sur

Answer 1

keep in mind that if everything doesn't work, than, may be, you should reload Facebook cache. http://developers.facebook.com/tools/lint/