When my article doesn't contain any image, Social Backlinks falls back on an unrelated image on my site? (aka wrong image is posted, etc)

When there is no image in the article, Social Backlinks lets Facebook choose by itself. You can customize your site template with a special meta-tag to specify on which image Facebook should fall back.

See this link: http://stackoverflow.com/

questions/5685850/can-i-make-a-change-to-my-website-to-nominate-an-image-to-be-used-by-facebook