The modals (in media/js/zamboni/global.js) are currently fixed positioned (meaning they don't move when someone scrolls), and are centered on the page. Our modals have become much more dynamic recently, which is resulting in odd positioning. Additionally, sometimes they get so long that they go off the bottom of the screen and there's no way to see the bottom. So, we need our modals to be positioned absolutely (so when the page is scrolled, the modal scrolls with it), and positioned 2ems or so from the top of the screen (so, $(window).scrollTop() + 2em) rather than centered vertically. If you need examples, let me know and I can quickly demonstrate.