Argh, looks like a kobo update didn't play ball with my KSM/koreader installation and I can't seem to get it out of a nasty bootloop. The device is not offering to do a factory reset after a few attempts either, it just keeps rebooting no matter what I do.
After many attempts to fix my screw-up I have decided to try starting from the ground up again: davidfor, could you send me a link to the Glo HD image please?