I tested the new Garmin 1903 maps both in Mapsource and on my Oregon 700. The maps themselves look great but my eye quickly fell on a large number of shopping cart-icons in cities and villages. After some examination of map tiles and the typ file it appears there are some new POI types in the 1903 maps (1812 maps didn't have them) that aren't present inside the typ file yet. In this case Mapsource and the Oregon 700 will show their own icons and because they are rather large they are cluttering the map. Since I always use my own typ files I could solve this problem easily.
These are the new POI (maybe there are more to be found):
Type=0x02e SubType=0x10 (Giftshop)
Type=0x02e SubType=0x11 (Music store)
Type=0x02e SubType=0x12 (Sports shop)
Type=0x02e SubType=0x13 (Liquor store)
Type=0x02e SubType=0x14 (Book store)
Type=0x02e SubType=0x0f (Florist)
The draworder of some polygons are wrong and as a result they are not showing up on the map:
Type=0x12 (Quarry) has Draworder 4
Type=0x17 (Meadow) has Draworder 6
A Quarry that's situated in an area with Meadows is invisible.
Type=0x10 (Camping) has Draworder 4
Type=0x02 (Residential Area) has Draworder 4
A Camping that's situated in a Residential area is sometimes invisible.
These are the new POI (maybe there are more to be found):
Type=0x02e SubType=0x10 (Giftshop)
Type=0x02e SubType=0x11 (Music store)
Type=0x02e SubType=0x12 (Sports shop)
Type=0x02e SubType=0x13 (Liquor store)
Type=0x02e SubType=0x14 (Book store)
Type=0x02e SubType=0x0f (Florist)
The draworder of some polygons are wrong and as a result they are not showing up on the map:
Type=0x12 (Quarry) has Draworder 4
Type=0x17 (Meadow) has Draworder 6
A Quarry that's situated in an area with Meadows is invisible.
Type=0x10 (Camping) has Draworder 4
Type=0x02 (Residential Area) has Draworder 4
A Camping that's situated in a Residential area is sometimes invisible.