Hi Menion,
This issue already was there in the previous map version and still exists in the updated 2011-09-03 Netherlands release.
I also miss a lot of detail from N52 28.xxx, E006 37.xxx to N53 19.xxx, E007 01.xxx compared to the surroundings on zoom levels (10) and (11).
The part mentioned in above reply is N51 37.xxx, E004 13.xxx to N52 28.xxx, E005 37.xxx and here zoom levels (1) to (11) are completely missing.
Could you please check what's wrong, regenerate the map and make it available trough download add-on?
Regards,
Dibrial