Facebook picks up based on one of two things:

Open Graph tags

Add a head meta tag <meta property="og:image" content="{IMG URL}" />

(Easy solution is a regex to pick image out of $node->content and use that. If no image is available, then have a general purpose one available to throw in the tag. This can all be done in the theme.)

Parsing Content

If there are no OG tags, then FB will try and determine the image from the content. A lot depends on the HTML structure of the page. Sometimes you can reorder things in the template to get it to pick up.

For testing purposes, use the Facebook debugger:

http://developers.facebook.com/tools/debug

Facebook only scrapes pages once every 24 hours, so using that tool is the best way to make sure you got it.

Jamie Holly
http://www.intoxination.net 
http://www.hollyit.net

On 10/8/2012 5:20 PM, Ms. Nancy Wichmann wrote: