Vlejundo
Here is a map.txt, where caravans no longer get stuck crossing the alps.
To install, go to your M&B Warband/Module/1257AD folder, rename the map.txt present in that folder to maporig.txt, then paste the downloaded map.txt into that 1257AD folder.
The idea of renaming the original map.txt, rather than overwriting it is, that if you should have any issues, you have a backup.
http://rapidshare.com/files/423944673/map.zip
To install, go to your M&B Warband/Module/1257AD folder, rename the map.txt present in that folder to maporig.txt, then paste the downloaded map.txt into that 1257AD folder.
The idea of renaming the original map.txt, rather than overwriting it is, that if you should have any issues, you have a backup.