Hi Community,
I've seen the behavior described in this thread today as well. There aren't any aspects of the Auctiva software that would cause the eBay shipping calculator not to show up in listings, so there must be something amiss on the eBay end of things that is causing this to happen.
If you have any additional questions or concerns, please contact our customer support team using the web form on the following page of our site: http://www.auctiva.com/help/requesthelp.aspx
-Mike