IPv6 updates fail for me though not because of AAAA records, but rather because the web site doesn't seem to be configured on the IPv6 side:
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/quantal-security/multiverse/binary-amd64/Packages 404 Not Found [IP: 2001:67c:1360:8c01::18 80]
IPv6 updates fail for me though not because of AAAA records, but rather because the web site doesn't seem to be configured on the IPv6 side:
W: Failed to fetch http:// security. ubuntu. com/ubuntu/ dists/quantal- security/ multiverse/ binary- amd64/Packages 404 Not Found [IP: 2001:67c: 1360:8c01: :18 80]