Pat Guano reviewed tidy: Thumbs up

Thumbs up: Neither Tidy, nor the W3C online-validator are always correct in evaluating the standard-conformity of (x)html- and xml-code. However, Tidy does an awesome job and, as far as I know, it is the only offline-tool which combines in this way the automated validation and correction of existing markup-code. In my opinion you quite simply need Tidy, when you are willing to publish something clean and correct, more than to incorporate each and every spectacular gimmick in your HTML. Do the final validation with the online-validator at validome.org and you will be fine.