I tried on an AMD 64 bit as well as an old Intel 32 bit system and received the same error. Running update-manager -d from the terminal also produced this message:
authenticate 'quantal.tar.gz' against 'quantal.tar.gz.gpg' extracting 'quantal.tar.gz' WARNING: Failed to read mirror file -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1003042 Title: Quantal Package List Contains Sources That Cannot Be Downloaded To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/1003042/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
