I've been spending perhaps too much time fixing problems identified by http://keepright.ipax.at/. For reasons I don't understand, the USA TIGER import seems to have more problems of certain types in certain areas. For example, a lot of roads in Washington state seem to have layer tags for no apparent reason.
It would be nice if there was a way to correct more than one problem at a time, as loading Potlatch for each change is slow. I'm using a G5 Mac, so I can't use its JOSM option...right? This would be particularly useful for making changes like joining roads that are split across county lines.