Debian has updated their signing keys so apt-get update produces errors like these:
W: GPG error: http://mirrors.dk.telia.net testing Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 010908312D230C5F
W: GPG error: http://mirrors.dk.telia.net unstable Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 010908312D230C5F
W: You may want to run apt-get update to correct these problems
The solution is to import the new keys (run as root):
<
pre>wget
http://ftp
-master.debian.org/ziyi_key_2006.asc -O - | apt-key add - and rerun apt-get update.
"