Xhtml Code Validity

There was a time when this site was 100% xhtml valid. It didn't last long, as as soon as I forgot to correctly close a tag anywhere on the page, or added some beta-ish new functionality, or updated my cake version inevitably something became invalid. I used the Xhtml Validation helper for a while, but the messages it generated got in the way rather than helping. I still use it for certain tasks, such as checking comments and these blogs for well-formedness, it's a handy class of that there's no doubt but not the way I was trying to use it.

For this site my primary concern is that the code is at least well-formed and preferably 100% valid (xhtml). But rather than trust the W3 Validator to tell me my pages are fine; there's a much faster way to both detect and prompt fixing fundamental errors: Public Embarrassment.