From the crash info, it looks like a bad <zoneshortname>.map file in your Maps folder. Which zone is it, and where did you get the .map for it ?
EDIT: The zone log might should have some more info on the .map which may aid us in debugging, e.g.
Code:
Map header: 10659 faces, 156 nodes, 14498 facelists
Loaded map: 31977 vertices, 10659 faces
Map BB: (-1299.47 -> 1499.41, -2998.81 -> 867.66, -43.97 -> 779.69)
Map ./Maps/qrg.map loaded.