[Plugin: Dublin Core for WP] Apparently generating invalid HTML

The W3C validator reports errors caused by this plugin:

http://validator.w3.org/check?verbose=1&uri=http://pigsonthewing.org.uk/making-difference-my-career/

e.g.

The scheme attribute on the meta element is obsolete. Use only one scheme per field, or make the scheme declaration part of the value.

<meta name=”DC.date.created” scheme=”WTN8601″ content=”2011-05-03T12:12:12″ />

http://ww.wp.xz.cn/extend/plugins/dublin-core-for-wp/