Got a notification to update maps. Used Garmin Express with the usual shuttle the USB drive back and forth game. But, unlike previous times, the progress indicator didn't go over 100%.
Totally blank maps. Address lookup locks up after entering a single character. No detail at all until you zoom out to the country level. Some POI indicators but no roads.
Checking the list of installed maps it looks like it might have got both 2026.10 and 2017.10 installed.
Weird!