cannot import key

[Marco d'Itri]

I can't import key 0x527F8911 (got it from a keyserver), what's wrong
with it?

$ LANG= gpg --import new-key
gpg: key 527F8911: invalid self-signature
gpg: key 527F8911: no valid user IDs
gpg: this may be caused by a missing self-signature
gpg: Total number processed: 1
gpg:           w/o user IDs: 1

Is it damaged? The owner is a friend of mine and he can't use it with
gnupg either.
If it's damaged, can it be repaired?

-- 
ciao,
Marco