This is not a bug. The public key is missing. Do as said in http://deb.opera.com/ : run the following command at terminal:
wget -O - http://deb.opera.com/archive.key | sudo apt-key add - ** Changed in: nautilus (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to nautilus in ubuntu. https://bugs.launchpad.net/bugs/706673 Title: W: Errore GPG: http://deb.opera.com stable Release: Le seguenti firme non sono state verificate perché la chiave pubblica non è disponibile: NO_PUBKEY F9A2F76A9D1A0061 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
