The post's featured image is used as the thumbnail when the page is being shared on facebook. A default image can also be specified.
You can upload new thumbnail in Settings->Easy Facebook Share Thumbnails.
For default, Facebook Share will use your active thumbnail if the page that you are going to share does not have thumbnail.
You can do this using Featured Image in Post/Page settings.
The plugin will automatically activate Featured Image even the current theme used does not support this feature.
Only .GIF, .PNG and .JPEG that are currently supported.
The plugin is still in its infancy. The rapid evolution of facebook is great, but its hard to keep up sometimes when developing free plugins. Were committed to the plugin though! Please help by reporting any bugs you find. Please do this before giving us a bad rating - we will do everything we can to fix things! Report A bug
When trying out sharing functionality on facebook, your page may be saved or cached in the incorrect manner. If you have been making a number of changes to your post and would like facebook to get a fresh copy, kindly add a random number to your post url instead of the Xs like so: http://domain.com/this-is-the-post-title/?efs=XXXX This will trick facebook into thinking that you are sharing a different page, and load up the latest copy (of the same page).
Kindly try and deactivate and reactive the plugin on the Plugins page. If this doesnt work, please make sure that no other facebook function-adding plugins are running alongside this one.
Be sure that the thumbnails directory in the plugin directory is writable.