[Plugin: Simple Facebook Connect] Wrong og:url with a child theme

Hi,

I use SFC for Open Graph Data and for some posts the og:url is wrong, for example : http://blogue.lavitrine.com/2012/03/bienvenue-sur-le-leche-vitrine/

When I activate the parent theme directly the og:url is good.

Which parameter/variable sfc uses to generate the og:url tag in the header ?

Thank you !

Julien

http://wordpress.org/extend/plugins/simple-facebook-connect/