Sites like that tend to mislead you by dancing around the biggest most important aspect of browser compatibility. HTML and CSS so perfect and beautiful, right

Sites like that tend to mislead you by dancing around the biggest most important aspect of browser compatibility. HTML and CSS so perfect and beautiful, right until the point where your website looks like it's melted in Opera, Firefox, Safari, Chrome or IE. There are some HTML and CSS cookbooks that do all right, but it's borderline impossible to get a grasp over the whole thing.