If starting mongod using a non-default security.sasl.serviceName, the mongo shell (and any drivers) will need to specify the new service name. This should be made clear in the docs anywhere the saslServiceName is mentioned.
The documentation currently lacks any mention of the --gssapiServiceName parameter for mongo.exe.
Pages that need an update (best guess)
- http://docs.mongodb.org/manual/reference/program/mongo/
- http://docs.mongodb.org/manual/tutorial/control-access-to-mongodb-with-kerberos-authentication/
- http://docs.mongodb.org/manual/reference/configuration-options/#security.sasl.serviceName
I suspect there are driver pages that will also need updating.