It's sad that the firmware update didn't help If you remove all maps except basemap, does it mess up still? Have you tried different country map? Here is a small map of Fresno, California USA
Spoiler: fresno, ca
[Only registered and activated users can see links. ]


I don't have much time right now to work on different resolutions and also doubt it would help you because the menus are ok but the map view is bad.

I don't know where that working list came from or how accurate it is.

I wish I had better answers for you.