Some other observations... would it be possible to enable more than one vector map? I live in the border area between The Netherlands and Germany, and that involves switching maps (unless I make a Europe Vector map
Is there (a 2 GB) limit on the vectormap size? I saw that Germany is 1.15 GB.
Is there some kind of caching possible? Zooming in and out seems to redraw from scratch. I realise vectormaps are not tiles, so this is maybe not possible.
O, and a little bug. If I switch vectormaps, the new one won't show until I zoom in our out. (edit: on second look, it seems to work right, but the disabled map still shows until I move away.)
Also, 50m seems to be the max-zoom, but the (+) button does not get disabled.