Thanks for reporting this error. Are you still having the problem? It may have been a temporary mirror issue.
** Changed in: update-manager (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/774875 Title: During update, this message: W:Failed to fetch http://extras.ubuntu.com/ubuntu/dists/natty/Release.gpg Something wicked happened resolving 'extras.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. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs