I have a Joomla site (Joomla 1.5) which has some articles.
I have published a link on a facebook group. This link points to an article which has some photos.
Facebook then shows a photo automatically, but the photo that appears is related to a very old article, not to this one.
Is it possible to change the photo on facebook, or "explain to facebook" that this photo is not related to this article/link?