Yes I do. XHTML and CSS. I know
XHTML like the back of my hand, and
CSS is simple and I can find the solution via google in no time. Sometimes I have to give the same layout value in CSS two times, because one is for Firefox and one is IE. My blog looks identical in all browsers, Opera, Safari, IE6, IE7, Firefox 2 and 3.

I tested it with the tool you gave us in some other thread of yours
