I got my jquery-mobile(1.3.2)-page <http://www.bestellbaer.de/app/guest/mobile/order/orderPoint.xhtml?orderPointId=6>

On this page, I am using [jQuery-Mobile-Bootstrap-Theme](https://github.com/commadelimited/jQuery-Mobile-Bootstrap-Theme) for design and [jQuery-Mobile-Icon-Pack](https://github.com/commadelimited/jQuery-Mobile-Icon-Pack) for having additional icons.

When viewing the page in android(4.3)-default browser (on Google Nexus), everything is displayed correctly. But viewing the page in mobile-chrome (28.0.1500.94) or mobile-firefox(22.0), some icons are moved for some pixels.

What is the reason for this, how can I fix it?