Web Development Mistakes
http://www.456bereastreet.com/archive/200408/web_development_mistakes/

456 Berea Street
2004

Abstract:

When I visit a website, especially if it’s the site of a competitor or a prospective client, I like viewing source and take a look at what’s under the hood. It’s one of my not-so-secret obsessions. And I am way too often absolutely disgusted by what I see. The web is overflowing with sites that use horribly invalid, broken, and inaccessible markup.