My work flows can be a bit 'weird' sometimes so I'm not surprised! There must be something going on somewhere as a particular set of SH coefficients should usually generate the same dependence all things being equal. Alan didn't find anything so everything is self-consistent within a version, just switching seems to do odd stuff... one of life's mysteries I suppose
No worries on the Linux front - it's why I posted it.
It's handy being able to check something out without the hassle of re-booting. It also cracks open the door to dumping Windows as my primary OS when Win10 reaches EOL ;-)