Hm, if it is using the same hash all over the world (on your computer it has the same salt as on the MtGox server?), what is the point? I don't understand how this salting scheme is supposed to work?
In theory, it just slows it down so rainbow tables are ineffective (not that people need them anymore), and it requires you to brute force each password than brute forcing one password and then checking it against everything.
In reality, it's all MD5 and the passwords were leaked to a community who are running tons of GPUs to brute force hashes. So it's kind of irrelevant.
Edit: Ah OK, the salt is encoded in the String.