[mkgmap-dev] rendering roundabouts

I noticed that some roundabouts are rendered very badly, like this one: http://img153.imageshack.us/img153/1677/rotonde.jpg http://www.openstreetmap.org/browse/way/81912267 Can I improve the rendering by changing some settings (reduce-point-density, merge-lines or remove-short-arcs)? Or is it just the way those roundabouts are mapped that causes this behaviour?