[itunes backup 9] Password empty although cracked

Hey guys,

I've run into a problem:

I've got an itunes backup 9 hash (14700) which I tried to crack.
My first try was to run it against the rockyou list. 1 sek later: Password was cracked.

Now the problem: --show doesn't display any password. It's just empty space. The password isn't " ", and itunes doesn't allow empty passwords.

Any ideas?