Anonymous

apt-get update
Get:1 http://www.debian-multimedia.org etch Release.gpg [189B]
Hit http://www.debian-multimedia.org etch Release
Err http://www.debian-multimedia.org etch Release

Get:2 http://www.debian-multimedia.org etch Release [5535B]
Ign http://www.debian-multimedia.org etch Release
Ign http://www.debian-multimedia.org etch/main Packages/DiffIndex
Hit http://www.debian-multimedia.org etch/main Packages
Get:3 http://ftp.hu.debian.org etch Release.gpg [378B]
Get:4 http://ftp.hu.debian.org etch Release [58.2kB]
Ign http://ftp.hu.debian.org etch/main Packages/DiffIndex
Ign http://ftp.hu.debian.org etch/contrib Packages/DiffIndex
Ign http://ftp.hu.debian.org etch/non-free Packages/DiffIndex
Hit http://ftp.hu.debian.org etch/main Packages
Hit http://ftp.hu.debian.org etch/contrib Packages
Hit http://ftp.hu.debian.org etch/non-free Packages
Fetched 64.3kB in 1s (32.7kB/s)
Reading package lists... Done
W: GPG error: http://www.debian-multimedia.org etch Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 07DC563D1F41B907
W: You may want to run apt-get update to correct these problems