What does og:image meta data do with the Facebook Like iframe?

Posted by Charles Boyung on Stack Overflow See other posts from Stack Overflow or by Charles Boyung
Published on 2010-05-17T02:42:17Z Indexed on 2010/05/17 2:50 UTC
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I am working on putting the Facebook "Like" iframe on a site, and I am trying to follow the example found at http://developers.facebook.com/docs/reference/plugins/like.

I am putting in code similar to this:

<meta property="og:image" content="http://ia.media-imdb.com/rock.jpg"/>

But when I "Like" a page, it doesn't do anything with the image that I am aware of. Does anyone know what that data is supposed to do?

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