Yeah, I meant it's best to author in a browser that renders properly, as that way you'll get into the habit of producing proper, valid, well-structured code which you can then modify for compatibility in the shit browsers such as IE.
Developing and testing in IE is fine if you know your target audience (e.g. intranet users) will be using that particular browser, but trying to use your way of working when producing sites that need to be as accessible as possible (e.g. display the same on Opera, Firefox, IE, Safari, IE/Mac, etc) is a sure way of giving yourself as much grief as possible, and it will most likely also have a knock-on effect on the quality of your code.