At around (582, 194), the user can walk around map delimiters and end out of the map area.
Note:
See provided video:
http://www.youtube.com/watch?v=bGN3cbmxD2w
I submitted an in-game bug report about this as well (ticket ID #1,813,830)
Steps to Reproduce:
1. Head into "The Edge of the underdark map.
2. Proceed to roughly 582, 194 coordinates.
3. Navigate around the invisible wall between the magenta looking pillar and the left side of the door.
Actual Result:
Player is able to go around map delimiter/collision walls and end up outside the map area.
Expected Result:
Map collision should be properly placed to prevent the player from going out of world.