After five consecutive beta test periods, a new version
(v0.6.5) of the Markup Validator was released today. This maintenance
version of the popular service introduces significant improvements in
user-friendliness, thanks to improved documentation, usability,
accessibility, as well as new features such as community-contributed
error explanations and user-friendly fallback mechanisms.

Brilliant news, and many many thanks to all those (unpaid) developers, QA people and everyone who gives feedback to the www-validator mailing list.