Carnster,
No problem for the support. Thanks for your subscription, which lets us keep developing new features and providing our high level of support!
With that said, to get the image you want, you need to use Open Graph tags to specify the image you want to show when the Like button is clicked. You already have the Open Graph integration enabled, so all you need to do is add the following tag to your article to specify the image you want used:
{JFBCGraph image=http://site.com/link-to-image.jpg}
It will take Facebook 24-48 hours to update the image for new like's, so if you try right away, you may not see a difference. You can use the debug tool to see what Facebook 'sees' on your page from the Open Graph tags:
developers.facebook.com/tools/debug
Finally, you can also use the Open Graph tab in the social configuration area to specify a default image, in case you haven't explicitly set one on a page using the tag above. This is good for using your logo or something, just to make sure some random image isn't shown. To do so, add the following tag into the defaults box:
image=http://site.com/good-default-image.jpg}
Hope that helps, but if you have any other questions, just let us know.
Alex
P.S. Deus Ex Human Evolution rocks!