I've set up a form at https://seabeehf.org/museum/buy-a-brick/. In IE7 and IE8, the form does not show up at all. I peeked into the code and saw that the form is hidden when the page loads to prevent the conditional hidden fields from flickering before the page is ready. I see that there is some inline JavaScript that should make the form show up, but it doesn't seem to be working.
I did notice one error with an invalid argument in the jquery.js file, but I'm not sure if that's related to the issue or not, but I can only assume so.
Thanks!