A quick & dirty workaround which works, but I don't know if there could be any potential side-effect:
$ sudo cp /var/lib/apt/lists/archive.ubuntu .com_ubuntu_dists_natty_main_i18n_Translation-es /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_natty- security_main_i18n_Translation-es -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/775412 Title: Translations of packages descriptions disappears from one version to another -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs