Mark, WanMil, It seems that the anti-island check got the piecewise defined coast line of Inarinjärvi (Lake Inari) wrong. I now defined a multipolygon for the lake and its about 700 islands, hopefully making no mistake in the process: http://www.openstreetmap.org/browse/relation/402543 Some islands contain lakes, and according to the wiki should include those in the relation as well. Here is an example: http://www.openstreetmap.org/browse/way/31257120 http://www.openstreetmap.org/?mlat=68.8415&mlon=27.5145&zoom=13 The coastline of Lake Inari is to the west of that lake. I will have to check if these lakes look fine, and also that these lakes or patches of water will not inherit the name from the relation. I will add the lakes on that island to the multipolygon, as a test case. JOSM is getting slow at this. Does anyone know a JOSM trick that would allow me to select exactly everything that is bounded by the current selection? There is natural=water near the coastline, on the mainland, and I do not want to add those as role=outer. Marko