Thank you very much for the tip.
I am trying Opensharecount and it seems to work. 😉
Just one more question (and everything will be perfect for me with Pinboard Theme) : could you please tell me how to add space between the Twitter button and the G+ button ? As you can see here for example, they are very close compared to the FB button : http://photographika.fr/comment-photographier-le-lapin/
Thanks again for taking time improving my blog. Your help is warmly welcomed.