Solution1 - 6:08 am on Oct 7, 2010 (gmt 0)

Like Fotiman, I use the empty HTML5 doctype for shortness, and don't use much of the new HTML5 stuff, yet.

But I do use the <menu> tag, instead of <ul>, which had been needlessly deprecated by the W3C. It is now again part of HTML5, and is, of course, still supported by all browsers.