Possible Duplicate:
How does Facebook Sharer select Images?
My site publish a link to every user profile page into my FB fan page wall
Every user has a default avatar, when a user update the photo, the avatar is replaced by the uploaded photo. But on the Fan page wall, the image doesn't update, why? In user page i correctly create the image tag with the image url, like this:
<meta property="og:image" content="http://ia.media-imdb.com/rock.jpg"/>
This is a link with default photo: LinkWithDefaultAvatar
This is a link with user updated photo, but from FB wall i see the default photo again;maybe Facebook store the link content posted previously instead of retrieve the new image?
thanks