Usually I'll finish an App, continue testing with FF, then cross my fingers and load in IE. Then I fix the carnage over several hours/days and test then revert

Usually I'll finish an App, continue testing with FF, then cross my fingers and load in IE. Then I fix the carnage over several hours/days and test then revert back to Firefox to make sure nothing has broken. All the other browsers usually just take a couple hours of tweaks to cater to. I wish Microsoft would force an IE7 update.