HTML is not quite valid

[ivankozik]

gwern pointed out that the HTML doesn't quite validate, probably due to recent changes:

    Error Line 487, Column 26: Element span not allowed as child of element ul in this context. (Suppressing further errors from this subtree.)

            <span class="copyright">PredictionBook © 2008-2011</span>

    Contexts in which element span may be used:
        Where phrasing content is expected.
    Content model for element ul:
        Zero or more li elements.

http://validator.w3.org/check?uri=http%3A%2F%2Fpredictionbook.com%2Fhappenstance&charset=%28detect+automatically%29&doctype=Inline&group=0