I hate to criticize a gift-horse. But the tutorial mentioned in my subject line is almost comical. I’ve viewed it in Chrome and in FireFox. There are so many problems with it that you can’t even use it. It’s almost like an exercise to see if you can find all the problems. And so it’s more of a test for someone who’s already gained some knowledge elsewhere to see if they can find all the things that don’t render properly. It’s sort of like a gun-safety expert teaching a class and accidentally blowing his head off because he forgot to unload the gun. Sorry.
I assume you are referring to this excerpt from the book?
Learn HTML and CSS: An Absolute Beginner’s Guide Article » SitePoint
So what are the problems? It would be better to cite something concrete than write it off without a clear reason.
I agree with Ralph, there’s no much that we can do to help if we don’t know where the problem lies.