McMohan - 10:58 am on Oct 23, 2013 (gmt 0)
Preferred domain is set to www and non-www redirected to www.
Site is not indexed with any non-www URLs.
On the same day www version received a message to the effect that penalty was revoked, non-www version received a message that site still violates. A far fetched idea could be there are some poison links pointing to non-www, but then I would assume Google not to lift penalty from www.
mihomes - There were two separate messages, one to www and one to non-www. It is not a cache issue.