This is an archived snapshot of W3C's public bugzilla bug tracker, decommissioned in April 2019. Please see the home page for more details.
I have found that the W3C Markup Validator version 0.7.1 does not recognise a meta tag error. I conducted a test by inserting a meta tag into the header section: <meta http-equiv="Content-Ladnguage" content="de"> The uploaded HTML document was validated despite it containing an obvious fault. I am fully aware that this cannot be considered to be a fault related to HTML validation itself. But it would be nice if W3C Markup Validator checks more thoroughly - including meta data and valid language/country codes.