Small images to Facebook

Following the latest Next SNAPS update this morning (Wednesday) I have had issues with posts to Facebook.

All of a sudden my Facebook posts are only showing a small image with the textual content rather than the big one, even though the images are large enough (800px).

Facebook debugger is pulling a large image, but not displaying it on my Facebook page.

It seems a bit of a coincidence that after updating the plugin the issues have arisen.

http://www.facebook.com/islandecho

https://wordpress.org/plugins/social-networks-auto-poster-facebook-twitter-g/