download button is to big in Social Marketing

Hi, I have installed social marketing and mess a little with the Style.css in order to make it fit my posts.

Here is an example at the bottom of teh post: http://www.hellosamples.com/2013/06/03/nevevinyl-vol123-compilation/

When someone share the content on facebook, the download button that appears is very big and not corresponds to the page style.

Please, test it. It's very ugly to see this.

Thanks in advance