Twitter share button width is wrong


#1

The button on my website is cut off because it is rendered with about half the width it should have. Whether the data-size is set to large or medium the width is always wrong. Changing the iframe width with firebug fixes this.
What to do?

http://www.mrpeppermarketing.com/blogue/medias-sociaux/6-conseils-campagne-marketing-medias-sociaux.html


#2