freejung - 11:36 pm on Feb 17, 2011 (gmt 0)

Until you press the button to find out how many and what type of errors you have, you'll have no way of judging whether it's an issue or not.

I absolutely agree. Indeed, I would completely agree that all of your code should validate unless you have a specific reason to do otherwise and you know exactly what you're doing.

Maybe code validation should be considered as more of a prerequisite to doing SEO rather than an SEO tactic in itself. If you do it badly wrong, you're going to fail, but getting it right will not necessarily lead you toward success.