Sorry about that. And thanks for the feedback. What browser are you using ?

Personally I do not like editors that nag me about "invalid" HTML, when most browsers can render the page perfectly well even if it's missing a title element or you screwed up the doctype. A HTML validator should be straightforward to implement though if you consider it a must have feature.

The editor however has semantic coloring and indentation, which should make some errors obvious, such as unclosed html tags.