Hi you two,
It must have something to do with Fedora as well, though. My SpaceNavigator has been working without any hiccup or changes in 64-bit from day one I made the switch (even when I was still needing to build my own 64-bit version of the viewer). I am, however, running under xubuntu (16.04). As much as I depend on it for taking pictures, Henri would have been sure to hear about it from me if something had been amiss at any point.