I've read plenty of articles about the all-importance of validation, and some about why validation isn't important. The articles that dismiss striving for the green light usually cite examples of people breaking down their code and inadvertently removing functionality in a frenzied attempt to validate their markup. While I'm sure this sometimes happens, if the developer of a site keeps standards in mind while building, there won't be a need to change much, if anything, in order to validate. Read More...