W: GPG error: http://debian.beryl-project.org etch Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 3FF0DB166A7476EA
W: GPG error: http://deb.opera.com etch Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 033431536A423791
W: GPG error: http://www.debian-multimedia.org unstable Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 07DC563D1F41B907
W: GPG error: http://ftp.sunet.se testing Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 07DC563D1F41B907
W: Duplicate sources.list entry http://security.debian.org lenny/updates/main Packages (/var/lib/apt/lists/security.debian.org_dists_lenny_updates_main_binary-i386_Packages)
W: Duplicate sources.list entry http://security.debian.org lenny/updates/contrib Packages (/var/lib/apt/lists/security.debian.org_dists_lenny_updates_contrib_binary-i386_Packages)
W: You may want to run apt-get update to correct these problems