I want to use a flat panorama as the initial scene of a multires tour. So with krpano 1.17 I built the tour of spherical panos, and built a standalone flat pano. Then I copied the flat pano's tiles into vtour/panos and copied the relevant part of its xml file into a new scene in the tour xml. The tour worked fine when displayed locally, but when I first tried to open it from the web I got "FATAL ERROR: no HTML5 compatible images available!", with both Firefox and Chrome (Win7). In both cases reloading the page resulted in a normal display, and the page continued to work normally after clearing cache and/or restarting the browser.
I think this must be a bug. The xml file is attached.