this bugs says "Precise	Fix Released  Medium	  Brian Murray  Edit"

apt-listchanges -a /var/cache/apt/archives/unattended-upgrades_0.76ubuntu1.2_all.deb says

" unattended-upgrades (0.76ubuntu1.2) precise-proposed; urgency=medium

  * cherry pick fix for unused-dependencies removal. (LP: #1267059)

 -- Brian Murray <email address hidden>  Fri, 11 Dec 2015 10:06:00 -0800"


first run

root@mailhost:/boot# unattended-upgrades -d --dry-run
Initial blacklisted packages:
Starting unattended upgrades script
Allowed origins are: ['o=Ubuntu,a=precise-security']
adjusting candidate version: '<Version: package:'apt' version:'0.8.16~exp12ubuntu10.21'>'
adjusting candidate version: '<Version: package:'apt-transport-https' version:'0.8.16~exp12ubuntu10.21'>'
adjusting candidate version: '<Version: package:'apt-utils' version:'0.8.16~exp12ubuntu10.21'>'
adjusting candidate version: '<Version: package:'e2fslibs' version:'1.42-1ubuntu2.2'>'
adjusting candidate version: '<Version: package:'e2fsprogs' version:'1.42-1ubuntu2.2'>'
adjusting candidate version: '<Version: package:'libapt-inst1.4' version:'0.8.16~exp12ubuntu10.21'>'
adjusting candidate version: '<Version: package:'libapt-pkg4.12' version:'0.8.16~exp12ubuntu10.21'>'
adjusting candidate version: '<Version: package:'libcomerr2' version:'1.42-1ubuntu2.2'>'
adjusting candidate version: '<Version: package:'libss2' version:'1.42-1ubuntu2.2'>'
adjusting candidate version: '<Version: package:'ntpdate' version:'1:4.2.6.p3+dfsg-1ubuntu3.6'>'
adjusting candidate version: '<Version: package:'update-manager-core' version:'1:0.156.14.5'>'
Checking: dosfstools (["<Origin component:'main' archive:'precise-updates' origin:'Ubuntu' label:'Ubuntu' site:'ro.archive.ubuntu.com' isTrusted:True>"])
Checking: gdisk (["<Origin component:'universe' archive:'precise-updates' origin:'Ubuntu' label:'Ubuntu' site:'ro.archive.ubuntu.com' isTrusted:True>"])
Checking: libnvpair1 (["<Origin component:'main' archive:'precise' origin:'LP-PPA-zfs-native-daily' label:'ZFS Daily Releases for Ubuntu' site:'ppa.launchpad.net' isTrusted:True>", "<Origin component:'main' archive:'precise' origin:'LP-PPA-zfs-native-stable' label:'ZFS Stable Releases for Ubuntu' site:'ppa.launchpad.net' isTrusted:True>"])
Checking: libudev0 (["<Origin component:'main' archive:'precise-updates' origin:'Ubuntu' label:'Ubuntu' site:'ro.archive.ubuntu.com' isTrusted:True>"])
Checking: libuutil1 (["<Origin component:'main' archive:'precise' origin:'LP-PPA-zfs-native-daily' label:'ZFS Daily Releases for Ubuntu' site:'ppa.launchpad.net' isTrusted:True>", "<Origin component:'main' archive:'precise' origin:'LP-PPA-zfs-native-stable' label:'ZFS Stable Releases for Ubuntu' site:'ppa.launchpad.net' isTrusted:True>"])
Checking: libzfs2 (["<Origin component:'main' archive:'precise' origin:'LP-PPA-zfs-native-daily' label:'ZFS Daily Releases for Ubuntu' site:'ppa.launchpad.net' isTrusted:True>", "<Origin component:'main' archive:'precise' origin:'LP-PPA-zfs-native-stable' label:'ZFS Stable Releases for Ubuntu' site:'ppa.launchpad.net' isTrusted:True>"])
Checking: libzpool2 (["<Origin component:'main' archive:'precise' origin:'LP-PPA-zfs-native-daily' label:'ZFS Daily Releases for Ubuntu' site:'ppa.launchpad.net' isTrusted:True>", "<Origin component:'main' archive:'precise' origin:'LP-PPA-zfs-native-stable' label:'ZFS Stable Releases for Ubuntu' site:'ppa.launchpad.net' isTrusted:True>"])
Checking: spl (["<Origin component:'main' archive:'precise' origin:'LP-PPA-zfs-native-daily' label:'ZFS Daily Releases for Ubuntu' site:'ppa.launchpad.net' isTrusted:True>", "<Origin component:'main' archive:'precise' origin:'LP-PPA-zfs-native-stable' label:'ZFS Stable Releases for Ubuntu' site:'ppa.launchpad.net' isTrusted:True>"])
Checking: spl-dkms (["<Origin component:'main' archive:'precise' origin:'LP-PPA-zfs-native-daily' label:'ZFS Daily Releases for Ubuntu' site:'ppa.launchpad.net' isTrusted:True>", "<Origin component:'main' archive:'precise' origin:'LP-PPA-zfs-native-stable' label:'ZFS Stable Releases for Ubuntu' site:'ppa.launchpad.net' isTrusted:True>"])
Checking: udev (["<Origin component:'main' archive:'precise-updates' origin:'Ubuntu' label:'Ubuntu' site:'ro.archive.ubuntu.com' isTrusted:True>"])
Checking: upstart (["<Origin component:'main' archive:'precise-updates' origin:'Ubuntu' label:'Ubuntu' site:'ro.archive.ubuntu.com' isTrusted:True>"])
Checking: x11-utils (["<Origin component:'main' archive:'precise-updates' origin:'Ubuntu' label:'Ubuntu' site:'ro.archive.ubuntu.com' isTrusted:True>"])
Checking: zfs-dkms (["<Origin component:'main' archive:'precise' origin:'LP-PPA-zfs-native-daily' label:'ZFS Daily Releases for Ubuntu' site:'ppa.launchpad.net' isTrusted:True>", "<Origin component:'main' archive:'precise' origin:'LP-PPA-zfs-native-stable' label:'ZFS Stable Releases for Ubuntu' site:'ppa.launchpad.net' isTrusted:True>"])
Checking: zfs-doc (["<Origin component:'main' archive:'precise' origin:'LP-PPA-zfs-native-daily' label:'ZFS Daily Releases for Ubuntu' site:'ppa.launchpad.net' isTrusted:True>", "<Origin component:'main' archive:'precise' origin:'LP-PPA-zfs-native-stable' label:'ZFS Stable Releases for Ubuntu' site:'ppa.launchpad.net' isTrusted:True>"])
Checking: zfsutils (["<Origin component:'main' archive:'precise' origin:'LP-PPA-zfs-native-daily' label:'ZFS Daily Releases for Ubuntu' site:'ppa.launchpad.net' isTrusted:True>", "<Origin component:'main' archive:'precise' origin:'LP-PPA-zfs-native-stable' label:'ZFS Stable Releases for Ubuntu' site:'ppa.launchpad.net' isTrusted:True>"])
pkgs that look like they should be upgraded:
Fetched 0 B in 0s (0 B/s)
blacklist: []
InstCount=0 DelCount=0 BrokenCout=0
Option --dry-run given, *not* performing real actions
Packages that are upgraded:
adjusting candidate version: '<Version: package:'apt' version:'0.8.16~exp12ubuntu10.21'>'
adjusting candidate version: '<Version: package:'apt-transport-https' version:'0.8.16~exp12ubuntu10.21'>'
adjusting candidate version: '<Version: package:'apt-utils' version:'0.8.16~exp12ubuntu10.21'>'
adjusting candidate version: '<Version: package:'e2fslibs' version:'1.42-1ubuntu2.2'>'
adjusting candidate version: '<Version: package:'e2fsprogs' version:'1.42-1ubuntu2.2'>'
adjusting candidate version: '<Version: package:'libapt-inst1.4' version:'0.8.16~exp12ubuntu10.21'>'
adjusting candidate version: '<Version: package:'libapt-pkg4.12' version:'0.8.16~exp12ubuntu10.21'>'
adjusting candidate version: '<Version: package:'libcomerr2' version:'1.42-1ubuntu2.2'>'
adjusting candidate version: '<Version: package:'libss2' version:'1.42-1ubuntu2.2'>'
adjusting candidate version: '<Version: package:'ntpdate' version:'1:4.2.6.p3+dfsg-1ubuntu3.6'>'
adjusting candidate version: '<Version: package:'update-manager-core' version:'1:0.156.14.5'>'
marking linux-image-3.2.0-96-generic for remove
marking linux-image-3.2.0-82-generic for remove
marking python-aptdaemon for remove
marking libpolkit-backend-1-0 for remove
marking libck-connector0 for remove
marking linux-image-3.2.0-91-generic for remove
marking linux-image-3.2.0-83-generic for remove
marking linux-image-3.2.0-90-generic for remove
marking python-defer for remove
marking aptdaemon for remove
marking linux-image-3.2.0-84-generic for remove
marking linux-image-3.2.0-88-generic for remove
marking policykit-1 for remove
marking linux-image-3.2.0-97-generic for remove
marking linux-image-3.2.0-85-generic for remove
marking linux-image-3.2.0-95-generic for remove
marking linux-image-3.2.0-86-generic for remove
marking consolekit for remove
marking linux-image-3.2.0-94-generic for remove
marking python-pkg-resources for remove
marking linux-image-3.2.0-87-generic for remove
marking linux-image-3.2.0-93-generic for remove
marking libpam-ck-connector for remove
marking libpolkit-agent-1-0 for remove
marking linux-image-3.2.0-92-generic for remove
Packages that are auto removed: 'linux-image-3.2.0-96-generic linux-image-3.2.0-82-generic python-aptdaemon libpolkit-backend-1-0 libck-connector0 linux-image-3.2.0-91-generic linux-image-3.2.0-83-generic linux-image-3.2.0-90-generic python-defer aptdaemon linux-image-3.2.0-84-generic linux-image-3.2.0-88-generic policykit-1 linux-image-3.2.0-97-generic linux-image-3.2.0-85-generic linux-image-3.2.0-95-generic linux-image-3.2.0-86-generic consolekit linux-image-3.2.0-94-generic python-pkg-resources linux-image-3.2.0-87-generic linux-image-3.2.0-93-generic libpam-ck-connector libpolkit-agent-1-0 linux-image-3.2.0-92-generic'
/usr/bin/dpkg --status-fd 6 --force-depends --force-remove-essential --remove aptdaemon:all python-aptdaemon:all policykit-1:amd64 consolekit:amd64 libpam-ck-connector:amd64 libck-connector0:amd64 libpolkit-agent-1-0:amd64 libpolkit-backend-1-0:amd64 linux-image-3.2.0-82-generic:amd64 linux-image-3.2.0-83-generic:amd64 linux-image-3.2.0-84-generic:amd64 linux-image-3.2.0-85-generic:amd64 linux-image-3.2.0-86-generic:amd64 linux-image-3.2.0-87-generic:amd64 linux-image-3.2.0-88-generic:amd64 linux-image-3.2.0-90-generic:amd64 linux-image-3.2.0-91-generic:amd64 linux-image-3.2.0-92-generic:amd64 linux-image-3.2.0-93-generic:amd64 linux-image-3.2.0-94-generic:amd64 linux-image-3.2.0-95-generic:amd64 linux-image-3.2.0-96-generic:amd64 linux-image-3.2.0-97-generic:amd64 python-defer:all python-pkg-resources:all
localepurge: Disk space freed in /usr/share/locale: 0 KiB
localepurge: Disk space freed in /usr/share/man: 0 KiB

Total disk space freed by localepurge: 0 KiB

Packages auto-removed
InstCount=0 DelCount=25 BrokenCount=0

however, second run without --dry-run:

root@mailhost:/boot# unattended-upgrades -d
Initial blacklisted packages:
Starting unattended upgrades script
Allowed origins are: ['o=Ubuntu,a=precise-security']
adjusting candidate version: '<Version: package:'apt' version:'0.8.16~exp12ubuntu10.21'>'
adjusting candidate version: '<Version: package:'apt-transport-https' version:'0.8.16~exp12ubuntu10.21'>'
adjusting candidate version: '<Version: package:'apt-utils' version:'0.8.16~exp12ubuntu10.21'>'
adjusting candidate version: '<Version: package:'e2fslibs' version:'1.42-1ubuntu2.2'>'
adjusting candidate version: '<Version: package:'e2fsprogs' version:'1.42-1ubuntu2.2'>'
adjusting candidate version: '<Version: package:'libapt-inst1.4' version:'0.8.16~exp12ubuntu10.21'>'
adjusting candidate version: '<Version: package:'libapt-pkg4.12' version:'0.8.16~exp12ubuntu10.21'>'
adjusting candidate version: '<Version: package:'libcomerr2' version:'1.42-1ubuntu2.2'>'
adjusting candidate version: '<Version: package:'libss2' version:'1.42-1ubuntu2.2'>'
adjusting candidate version: '<Version: package:'ntpdate' version:'1:4.2.6.p3+dfsg-1ubuntu3.6'>'
adjusting candidate version: '<Version: package:'update-manager-core' version:'1:0.156.14.5'>'
Checking: dosfstools (["<Origin component:'main' archive:'precise-updates' origin:'Ubuntu' label:'Ubuntu' site:'ro.archive.ubuntu.com' isTrusted:True>"])
Checking: gdisk (["<Origin component:'universe' archive:'precise-updates' origin:'Ubuntu' label:'Ubuntu' site:'ro.archive.ubuntu.com' isTrusted:True>"])
Checking: libnvpair1 (["<Origin component:'main' archive:'precise' origin:'LP-PPA-zfs-native-daily' label:'ZFS Daily Releases for Ubuntu' site:'ppa.launchpad.net' isTrusted:True>", "<Origin component:'main' archive:'precise' origin:'LP-PPA-zfs-native-stable' label:'ZFS Stable Releases for Ubuntu' site:'ppa.launchpad.net' isTrusted:True>"])
Checking: libudev0 (["<Origin component:'main' archive:'precise-updates' origin:'Ubuntu' label:'Ubuntu' site:'ro.archive.ubuntu.com' isTrusted:True>"])
Checking: libuutil1 (["<Origin component:'main' archive:'precise' origin:'LP-PPA-zfs-native-daily' label:'ZFS Daily Releases for Ubuntu' site:'ppa.launchpad.net' isTrusted:True>", "<Origin component:'main' archive:'precise' origin:'LP-PPA-zfs-native-stable' label:'ZFS Stable Releases for Ubuntu' site:'ppa.launchpad.net' isTrusted:True>"])
Checking: libzfs2 (["<Origin component:'main' archive:'precise' origin:'LP-PPA-zfs-native-daily' label:'ZFS Daily Releases for Ubuntu' site:'ppa.launchpad.net' isTrusted:True>", "<Origin component:'main' archive:'precise' origin:'LP-PPA-zfs-native-stable' label:'ZFS Stable Releases for Ubuntu' site:'ppa.launchpad.net' isTrusted:True>"])
Checking: libzpool2 (["<Origin component:'main' archive:'precise' origin:'LP-PPA-zfs-native-daily' label:'ZFS Daily Releases for Ubuntu' site:'ppa.launchpad.net' isTrusted:True>", "<Origin component:'main' archive:'precise' origin:'LP-PPA-zfs-native-stable' label:'ZFS Stable Releases for Ubuntu' site:'ppa.launchpad.net' isTrusted:True>"])
Checking: spl (["<Origin component:'main' archive:'precise' origin:'LP-PPA-zfs-native-daily' label:'ZFS Daily Releases for Ubuntu' site:'ppa.launchpad.net' isTrusted:True>", "<Origin component:'main' archive:'precise' origin:'LP-PPA-zfs-native-stable' label:'ZFS Stable Releases for Ubuntu' site:'ppa.launchpad.net' isTrusted:True>"])
Checking: spl-dkms (["<Origin component:'main' archive:'precise' origin:'LP-PPA-zfs-native-daily' label:'ZFS Daily Releases for Ubuntu' site:'ppa.launchpad.net' isTrusted:True>", "<Origin component:'main' archive:'precise' origin:'LP-PPA-zfs-native-stable' label:'ZFS Stable Releases for Ubuntu' site:'ppa.launchpad.net' isTrusted:True>"])
Checking: udev (["<Origin component:'main' archive:'precise-updates' origin:'Ubuntu' label:'Ubuntu' site:'ro.archive.ubuntu.com' isTrusted:True>"])
Checking: upstart (["<Origin component:'main' archive:'precise-updates' origin:'Ubuntu' label:'Ubuntu' site:'ro.archive.ubuntu.com' isTrusted:True>"])
Checking: x11-utils (["<Origin component:'main' archive:'precise-updates' origin:'Ubuntu' label:'Ubuntu' site:'ro.archive.ubuntu.com' isTrusted:True>"])
Checking: zfs-dkms (["<Origin component:'main' archive:'precise' origin:'LP-PPA-zfs-native-daily' label:'ZFS Daily Releases for Ubuntu' site:'ppa.launchpad.net' isTrusted:True>", "<Origin component:'main' archive:'precise' origin:'LP-PPA-zfs-native-stable' label:'ZFS Stable Releases for Ubuntu' site:'ppa.launchpad.net' isTrusted:True>"])
Checking: zfs-doc (["<Origin component:'main' archive:'precise' origin:'LP-PPA-zfs-native-daily' label:'ZFS Daily Releases for Ubuntu' site:'ppa.launchpad.net' isTrusted:True>", "<Origin component:'main' archive:'precise' origin:'LP-PPA-zfs-native-stable' label:'ZFS Stable Releases for Ubuntu' site:'ppa.launchpad.net' isTrusted:True>"])
Checking: zfsutils (["<Origin component:'main' archive:'precise' origin:'LP-PPA-zfs-native-daily' label:'ZFS Daily Releases for Ubuntu' site:'ppa.launchpad.net' isTrusted:True>", "<Origin component:'main' archive:'precise' origin:'LP-PPA-zfs-native-stable' label:'ZFS Stable Releases for Ubuntu' site:'ppa.launchpad.net' isTrusted:True>"])
pkgs that look like they should be upgraded:
Fetched 0 B in 0s (0 B/s)
blacklist: []
InstCount=0 DelCount=0 BrokenCout=0
No packages found that can be upgraded unattended and no pending auto-removals


so... the 'fix' does not work.