Looking at the dialog again it says "Do you want to rewrite your 'sources.list' file anyway?" not "Do you want to rewrite every sources file in /etc/apt/sources.list.d/ file anyway?". So I think it is surprising that this had the effect of running with --allow-third-party.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2061923 Title: my upgrade to noble went up in flames To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/2061923/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
