Gravity form now working with Firefox

Hi, I'm creating a new website with a multipage form for a local insurance company. It works fine in every browser, exept for Firefox. When clicking 'next' in the Firefox browser, is seems to load, but you don't get the next page, you only land on the first page of the form again. Though if you hit refresh (F5), the form works perfectly. But I can't have prospects hitting F5 in order for the form to work. :) Is there a solution to this? Anyone?

edit: This is the url: http://privatforsikring.org/tilbud-privatforsikring/ (a norwegian site - jibberish for most of you).

Thanks! It was the plugin Shareaholic that caused the error. I think you should see the form now. I'm at least seeing it on three different computeres here, and tested it on every browsers. Again thanks.