2013/01/25 07:15:09 WARNING (ElementSaver): 70013157.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/37635692) has short arc (2.05m) at http://www.openstreetmap.org/?mlat=30.67383&mlon=104.05791&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!