2013/01/25 07:14:43 WARNING (ElementSaver): 70013154.osm.pbf:   Way null (http://www.openstreetmap.org/browse/way/51191098) has short arc (4.41m) at http://www.openstreetmap.org/?mlat=22.58789&mlon=114.28738&zoom=17 - but it can't be removed because both ends of the arc are boundary nodes!