There seems to be issues with WCM in either using multiple iparts on a content record... or in using the same ipart on content record - each with slightly differernt configuration options set.
We have a page that was published and working using 3 iparts (same ipart all 3 configured differently). We had some issues with the publishing service and after reinstalling the service manually that seems to be resolved. I can publish new pages but this page is not working.