After installing UR12, we are receiving an 'Access is denied' when trying to access an embedded iFrame in the Site Map. I suspect this is because the url contained in the iFrame is trying to access an internal website that executes code (login page) when launched. However, this used to work in all previous browsers before the update. My workaround for now it to have it pop the page out via window.open code but I would prefer to display the page within the iFrame as was the case prior to the update.