Problem to share the right thumbnail image on recommend button of facebook

Hello,

I did have a problem to have the right thumbnail.

If you click on this link:

http://www.jacquesgauthier.com/blog/entry/2-avril-mort-de-jean-paul-ii.html

We obtain the header image of the site and not the image of the pope in this page.

I did test the debugger of facebook and all seem ok...

Thank you for your help.

Andre