In the past couple of days Publicize has failed to post the image in my article on Facebook. Instead, it is posting a big "F" Facebook logo. When I manually post the article, the image shows correctly.
I haven't changed anything, and prior to the past couple of days it has been working fine for quite some time. I am presently using WordPress 3.6, and Jetpack 2.42
Here is my most recent article that failed to post the image on Facebook (I have since posted it manually):
Here is an example of a previous posting that used the Facebook logo:
FYI: I have run the Facebook debugger and the articles look OK to me.
Thanks for you help.