Enlistements page here reports that update have failed 9 month ago. Also "30-day commit activity" shows info about Aug 28 - Sep 27 in june.
Rescheduled the hung update which finished OK (209 added commits). Analysis page is at Jun 25 2012 and last commit is at 2012-06-25 (about 4 hours ago).
Please remind me here if the project hangs again.