We use the Interface overlay to add a logo to our images and exports. But it seems to conflict with the panoramas. See this example.
http://panorama.enscape3d.com/view/ejjnly4q/
It would be great if this overlay image could still be displayed in the panorama, but if that is too difficult, then Enscape should automatically ignore it when it creates panoramas. As it stands, we have to remember to disable the overlay before creating panoramas.