Seems to be a race with the apt cron job, which checks for updates regularly.
** Changed in: aptdaemon (Ubuntu) Status: New => Confirmed ** Changed in: aptdaemon (Ubuntu) Importance: Undecided => Critical -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/659438 Title: Installation/Removal fails because of package which could not be located (faiulre in apt.Cache.required_download) -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs