Hm, Osmarender seems to have trouble with the coastline here. It gets the land/water bit backwards for a rectangular area.
osm.org/?lat=45.4207&lon=-73.8804&zoom=12&layers=0B00FTF
Actually on further examination Osmarender gets a lot of the coastline around Montreal wrong. The whole tip of the island here is underwater including a lot of suburbs :)
Discussion
Comment from acrosscanadatrails on 29 May 2009 at 21:53
Thats because the residential area and water body polygons have not been imported yet. This will further define what the land actually is.
If you like, i can send you the .osm file of the area so you can see what will be imported?
Sam
Here's what i loaded yesterday.
osm.org/?lat=48.5081&lon=-123.3567&zoom=13&layers=0B00FTF
It should show up on mapnik in maybe a week.