I have successfully installed superfish-powered drop-down menus in my horizontal nav bar, but I get an irritating (and inconsistent) issue when I click on a nav link: the drop-down menus briefly "flash" down as the new page loads. In fact the page as a whole flashes. This behavior only occurs in IE8 (haven't tried 7) - Firefox, Safari, Chrome are all fine. The url is: peacefulnations.org
I'd appreciate any help. Thanks.