I'm trying to update package's repository but APT gives me this error:
W: Errore GPG: http://it.archive.ubuntu.com precise Release: Le seguenti firme non erano valide: BADSIG XXXXXXXXXXXXXXXX Ubuntu Archive Automatic Signing Key
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The Ubuntu Archive Automatic Signing Key is not valid. Can this problem make APT not to download important updates for my system? I'm using Ubuntu 12.04. Thank you!