Since version 3.0 Internet Explorer has had a "standalone mode" that has allowed web developers to view their work in several different versions of the browser concurrently, but earlier this month a cumulative security patch for IE6 released earlier this month broke standalone mode. It prevents, among other things, developers wishing to make their sites work with Internet Explorer 7 from doing so without abandoning IE6 altogether. The IE teams' flippant reply to the please of developers was that this is by design and standalone mode isn't supported and if they want to work with IE7 they have no choice but to use it exclusively. Despite their boneheaded attitude (brilliant, guys--for the first time in years developers actually want to work with IE, but you're gonna make it hard for them), somone, namely Jon Galloway, has found a workaround. Galloway came up with a registry patch and wrote a batch file that will let you run IE7, and then, when you're done, clean up the mess it left behind allowing you to run IE6 again. Great work, Jon!