No Facebook thumbnail image via Publicize

My much loved Jetpack Publicize can be tricky at times .

If you have Yoast’s Open Graph meta data enabled (find it at SEO | Social|Facebook|Add Open Graph meta data) Publicize will not add its own Open Graph metadata with the end result (in my case at least) your post Thumbnail is not displayed in Facebook.

This is readily confirmed using the Facebook Object debugger (make sure you test the post URL not the site root address)

Hat’s off to this JetPack Publicize Troubleshooting article for guiding me to the problem