[mkgmap-dev] Mkgmap complains about '&' in role id

There are a few tiles that fail to render due to 'Bad file format: 63240029.osm.gz' on every update and I've tracked it down to Mkgmap complaining about a '&' character in the role id of a way in a relation. Example: http://www.openstreetmap.org/browse/relation/359107 Can Mkgmap be made to accept this? Or is this an error in the planet dump procedure?