This one happened directly after a fresh install of Ubuntu 10.10:
W:Failed to fetch http://extras.ubuntu.com/ubuntu/dists/maverick/Release.gpg Something wicked happened resolving 'extras.ubuntu.com:http' (-5 - No address associated with hostname)
, W:Failed to fetch http://security.ubuntu.com/ubuntu/dists/maverick-security/Release.gpg Something wicked happened resolving 'security.ubuntu.com:http' (-5 - No address associated with hostname)
, E:Some index files failed to download, they have been ignored, or old ones used instead.
Edited by s33d1ing, 20 December 2010 - 03:14 AM.