[mkgmap-dev] Using the "--remove-short-arcs" option

Hi list, while building my map I am getting a lot of errors like this: SEVERE (RoadNetwork): 63240020.osm.gz: Road (ser, http://www.openstreetmap.org/browse/way/50972288) contains zero length arc at http://www.openstreetmap.org/?mlat=48.72715&mlon=21.24674&zoom=17 Bit of googling showed that "--remove-short-arcs" option exist. Can somebody explain me what impact will using this option on map itself? I mean will be map still route-able in these places? Will some details be lost? Or is it ok just ignore these errors? Thanks for help mira