It turns out the reason for this is that those packages are newer in gutsy than in harder, e.g. firefox:
hardy 2.0.0.10+2nobinonly-0ubuntu2 gutsy 2.0.0.6+2nobinonly-0ubuntu1 security 2.0.0.11+2nobinonly-0ubuntu0.7.10 updates 2.0.0.11+2nobinonly-0ubuntu0.7.10 This confuses the upgrader. -- [hardy] dist-upgrade removes a lot of (non-)obsolete packages https://bugs.launchpad.net/bugs/181201 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs