Online membership renewal - renewal block doesn't check for latest instance of a membership

If an authenticated user's contact record has a CURRENT membership and an EXPIRED (prior) membership of the same membership type - the membership renewal block at civicrm/contribute/transact should grab the LATEST instance and reflect that properly in the status message placed next to the membership type and fee.

I just tested this with a contact who had a General membership which expired Dec 1 2008 and a current General membership (expires Jan 25, 2010). When I logged in as that contact's user - the status message on the "renewal" form shows:

"Your General membership expired on December 1st, 2008."

(See forum post for similar case: http://forum.civicrm.org/index.php/topic,7269.0.html )