I have some strange behavior with the OFM Europe Map.
If I zoom to higher levels(between 200 and 50 KM) the screen stays grey and the yellow overzoom in the lower right part of the screen stays yellow.
I do not know if its a bug in Basecamp, as I updated today to 4.2.1, or a bug in the map.
All other maps seem to work and do not freeze during update, but they are a lot smaller.
rgds,
Bert