Here is a list of .xpm files defined in navit.xml but that do not exist.
autoservice.xpm
bay.xpm
bend.xpm
border_station.xpm
bowling.xpm
bridge.xpm
bussines_service.xpm
car_rent.xpm
car_wash.xpm
casino.xpm
civil.xpm
communication.xpm
concert.xpm
cove.xpm
crossing.xpm
dam.xpm
danger_area.xpm
dangerous.xpm
daymark.xpm
dining.xpm
diving.xpm
drinking_water.xpm
emergency.xpm
fair.xpm
fish.xpm
forbiden_area.xpm
garmin.xpm
ghost_town.xpm
goverment_building.xpm
height.xpm
hotspring.xpm
icesport.xpm
landmark.xpm
levee.xpm
locale.xpm
loudspeaker.xpm
mall.xpm
manmade_feature.xpm
marine_type.xpm
marine.xpm
mark.xpm
mine.xpm
nondangerous.xpm
oil_field.xpm
personal_service.xpm
public_office.xpm
repair_service.xpm
resort.xpm
restricted_area.xpm
rest_room.xpm
sailing.xpm
scenic_area.xpm
school.xpm
service.xpm
shop_apparel.xpm
shop_computer.xpm
shop_department.xpm
shop_furnish.xpm
shop_grocery.xpm
shop_handg.xpm
shop_merchandise.xpm
shop_retail.xpm
shower.xpm
social_service.xpm
sounding.xpm
stadium.xpm
subdivision.xpm
tide.xpm
trail.xpm
truck_stop.xpm
tunnel.xpm
wine.xpm
worship.xpm
wrecker.xpm
Good luck :)
