I have the code installed on a site and for some reason it has stopped working. It doesn't display. It was working until a few days ago. I have grabbed new code and still no luck.
There are two on the same page, is that not allowed any more?
Have a look here: http://www.marbella-inmobiliaria.com/marbella-nueva-promociones/24/La-Morera-Los-Monteros.html
Down low, where it says "Comparte este complejo" - should display underneath, doesn't.
The buttons appear to be showing up for me: http://i.imgur.com/E9UwZ.png
Can you give me some more information about your environment? (OS, browser, etc.)