franchi:~# apt-get update
Ign cdrom://[Debian GNU/Linux testing _Etch_ - Official Snapshot i386 NETINST Binary-1 20070301-21:52] etch Release.gpg
Ign cdrom://[Debian GNU/Linux testing _Etch_ - Official Snapshot i386 NETINST Binary-1 20070301-21:52] etch Release
Ign cdrom://[Debian GNU/Linux testing _Etch_ - Official Snapshot i386 NETINST Binary-1 20070301-21:52] etch/contrib Packages/DiffIndex
Ign cdrom://[Debian GNU/Linux testing _Etch_ - Official Snapshot i386 NETINST Binary-1 20070301-21:52] etch/main Packages/DiffIndex
Get:1 http://debian.yorku.ca etch Release.gpg [189B]
Hit http://debian.yorku.ca etch Release
Get:2 http://security.debian.org etch/updates Release.gpg [189B]
Err http://debian.yorku.ca etch Release

Get:3 http://debian.yorku.ca etch Release [74.4kB]
Hit http://security.debian.org etch/updates Release
Err http://security.debian.org etch/updates Release

Get:4 http://security.debian.org etch/updates Release [24.3kB]
Ign http://debian.yorku.ca etch Release
Ign http://security.debian.org etch/updates Release
Hit http://debian.yorku.ca etch/main Packages/DiffIndex
Ign http://security.debian.org etch/updates/main Packages/DiffIndex
Hit http://debian.yorku.ca etch/main Sources/DiffIndex
Ign http://security.debian.org etch/updates/contrib Packages/DiffIndex
Ign http://security.debian.org etch/updates/main Sources/DiffIndex
Ign http://security.debian.org etch/updates/contrib Sources/DiffIndex
Hit http://security.debian.org etch/updates/main Packages
Hit http://security.debian.org etch/updates/contrib Packages
Hit http://security.debian.org etch/updates/main Sources
Hit http://security.debian.org etch/updates/contrib Sources
Fetched 99.1kB in 2s (37.4kB/s)
Reading package lists... Done
W: GPG error: http://debian.yorku.ca etch Release: Unknown error executing gpgv
W: GPG error: http://security.debian.org etch/updates Release: Unknown error executing gpgv
W: You may want to run apt-get update to correct these problems