ROS.ie on Lion

If, after upgrading to MacOS Lion, you find that you can't access ROS.ie (Revenue Online Services), first, check if you have Java installed (by going here, for instance); it'll install it for you if you don't. If you still can't access it, try using Firefox. It looks like something has changed about the way Java applets ask for permission to look at your local filesystem (which they need for the ROS site, as they have to be able to read your client certificate); it seems to work in Firefox but not Safari or Chrome.