To specify the title, description or image you want used when the Like is clicked, you need to use Open Graph tags. Open Graph integration in JFBConnect is enabled by default, but you can check the setting in the Social Configuration -> Open Graph tab. Then, all you need to do is add the following tag to your listing or article, or any other place on the page to specify the data you want used:
{JFBCGraph title=Title for page}
{JFBCGraph descriptoin=Description for listing}
{JFBCGraph image=http://site.com/link-to-image.jpg}
It will take Facebook 24-48 hours to update the data 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
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
If no tags or defaults are set, JFBConnect will simply use whatever the meta data title and description are. Not all components set this (or they set it to something generic), so it's best to specify it on pages that you want control over.
For more about JFBConnect's Open Graph features, see:
www.sourcecoast.com/jfbconnect/features/...pen-graph-for-joomla
Hope that all helps,
Alex