Before I was a noob in the layout — for me it was a problem of IE6. When I learned to impose under IE6, for me it was a problem Opera. But just after half a year after I learned to impose under IE6, I got picked up under the wing of one Studio, who thought IE6 is an outdated browser. Since then, and it is about 10 months old, all who knocked at my for the layout didn't require IE6. Of course, if you need IE6, then it's a minimum extra payment. But I believe that if you are a larger firm, you should forget about IE6, because the money people with other browsers are no different from the money of users of IE6.