Have you tried using "javascript
:{}" instead of just "javascript
:;"?
Also, you said you had no hacks on here, but I see quite a few. Have you tried turning them all off while trouble shooting this problem? And, do you realize you are calling this script twice - p7tp/p7tpscripts.js? Once from your site, once from the other? Have you modified it at all? I would stay to calling them from your site so I would copy the other to your site also -
http://www.dwshare.com/p7tp_01.css . Also, they are both (the scripts not on your server) being called after the body tag. That isn't good.