apt-get update success but with errors

[Jonas Geiregat <jonas@geiregat.org>]

Hello,

At the end of the 'apt-get update' I get the follow output:

Fetched 74.6kB in 6s (11.3kB/s)                                                                                  
Reading package lists... Done
W: GPG error: http://http.us.debian.org testing Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY A70DAF536070D3A1
W: You may want to run apt-get update to correct these problems


Funny I just ran apt-get update while apt-get suggest I should run it again to fix the errors.