Originally from ticket #406.
I am running Afternight at www.yg2d.com. I am trying to get a thumbnail image to display as the meta image that shows up when I link to my site on Facebook, rather than the logo image. How can I do this?
it is easy, you have to remove the cache, edit the following image http://www.yg2d.com/wp-content/themes/afternight/fb_screenshot.png then use the facebook debugger http://developers.facebook.com/tools/debug for facebook to see the new image.
This should help you, good luck!