Hi,
Not sure if this is a bug or a feature request. I'm importing osm data but multipolygon relations don't seem to be respected. For example, a building with a central courtyard is imported as two separate polygons and you get a big building on top of a smaller one.
This is not a major issue - the workaround is to subtract one polygon from the other - but it does make the process more manual than it could be.
Thanks for a great tool. I've been creating osm data from a gml source so if there's a lot of demand for a gml front-end maybe I can help with that.
OSM relations are not really supported at the moment.