I know I risk getting downmodded to oblivion, but the developer tools in IE8 have actually brought me back to using IE for development some of the time. There

I know I risk getting downmodded to oblivion, but the developer tools in IE8 have actually brought me back to using IE for development some of the time. There are some specific features that are very handy - the debugger is awesome - better than the one in firebug. The CSS tracing features are even better than FireFox's for some specific situations. I now probably spend about 20% of my time in IE when developing pages (as opposed to almost never except for one off checking prior to IE8).