I ran the commands in terminal mode and update manager ran but ended in error:
1.) sudo rm /var/lib/apt/lists/*
2.) sudo apt-get update

Got the following messages:

installArchives() failed: 
Extracting templates from packages: 96%%
Extracting templates from packages: 100%%

Preconfiguring packages ...

 Extracting templates from packages: 96%%
Extracting templates from packages: 100%%

Preconfiguring packages ...

 Extracting templates from packages: 96%%
Extracting templates from packages: 100%%

Preconfiguring packages ...

 Extracting templates from packages: 96%%
Extracting templates from packages: 100%%

Preconfiguring packages ...

(Reading database ... 
(Reading database ... 5%%
(Reading database ... 10%%
(Reading database ... 15%%
(Reading database ... 20%%
(Reading database ... 25%%
(Reading database ... 30%%
(Reading database ... 35%%
(Reading database ... 40%%
(Reading database ... 45%%
(Reading database ... 50%%
(Reading database ... 55%%
(Reading database ... 60%%
(Reading database ... 65%%
(Reading database ... 70%%
(Reading database ... 75%%
(Reading database ... 80%%
(Reading database ... 85%%
(Reading database ... 90%%
(Reading database ... 95%%
(Reading database ... 100%%
(Reading database ... 192273 files and directories currently installed.)

Preparing to replace libapt-pkg4.12 0.8.16~exp12ubuntu10.7 (using .../libapt-pkg4.12_0.8.16~exp12ubuntu10.9_i386.deb) ...

Unpacking replacement libapt-pkg4.12 ...

Setting up libapt-pkg4.12 (0.8.16~exp12ubuntu10.9) ...

Processing triggers for libc-bin ...

ldconfig deferred processing now taking place

(Reading database ... 
(Reading database ... 5%%
(Reading database ... 10%%
(Reading database ... 15%%
(Reading database ... 20%%
(Reading database ... 25%%
(Reading database ... 30%%
(Reading database ... 35%%
(Reading database ... 40%%
(Reading database ... 45%%
(Reading database ... 50%%
(Reading database ... 55%%
(Reading database ... 60%%
(Reading database ... 65%%
(Reading database ... 70%%
(Reading database ... 75%%
(Reading database ... 80%%
(Reading database ... 85%%
(Reading database ... 90%%
(Reading database ... 95%%
(Reading database ... 100%%
(Reading database ... 192273 files and directories currently installed.)

Preparing to replace apt 0.8.16~exp12ubuntu10.7 (using .../apt_0.8.16~exp12ubuntu10.9_i386.deb) ...

Unpacking replacement apt ...

Processing triggers for man-db ...

Setting up apt (0.8.16~exp12ubuntu10.9) ...

Installing new version of config file /etc/apt/apt.conf.d/01autoremove ...

gpg: key 437D05B5: "Ubuntu Archive Automatic Signing Key <email address hidden>" not changed

gpg: key FBB75451: "Ubuntu CD Image Automatic Signing Key <email address hidden>" not changed

gpg: key C0B21F32: "Ubuntu Archive Automatic Signing Key (2012) <email address hidden>" not changed

gpg: key EFE21092: "Ubuntu CD Image Automatic Signing Key (2012) <email address hidden>" not changed

gpg: Total number processed: 4

gpg:              unchanged: 4

(Reading database ... 
(Reading database ... 5%%
(Reading database ... 10%%
(Reading database ... 15%%
(Reading database ... 20%%
(Reading database ... 25%%
(Reading database ... 30%%
(Reading database ... 35%%
(Reading database ... 40%%
(Reading database ... 45%%
(Reading database ... 50%%
(Reading database ... 55%%
(Reading database ... 60%%
(Reading database ... 65%%
(Reading database ... 70%%
(Reading database ... 75%%
(Reading database ... 80%%
(Reading database ... 85%%
(Reading database ... 90%%
(Reading database ... 95%%
(Reading database ... 100%%
(Reading database ... 192274 files and directories currently installed.)

Preparing to replace libapt-inst1.4 0.8.16~exp12ubuntu10.7 (using .../libapt-inst1.4_0.8.16~exp12ubuntu10.9_i386.deb) ...

Unpacking replacement libapt-inst1.4 ...

Preparing to replace apt-utils 0.8.16~exp12ubuntu10.7 (using .../apt-utils_0.8.16~exp12ubuntu10.9_i386.deb) ...

Unpacking replacement apt-utils ...

Preparing to replace apt-transport-https 0.8.16~exp12ubuntu10.7 (using .../apt-transport-https_0.8.16~exp12ubuntu10.9_i386.deb) ...

Unpacking replacement apt-transport-https ...

Preparing to replace linux-sound-base 1.0.25+dfsg-0ubuntu1 (using .../linux-sound-base_1.0.25+dfsg-0ubuntu1.1_all.deb) ...

Unpacking replacement linux-sound-base ...

Preparing to replace alsa-base 1.0.25+dfsg-0ubuntu1 (using .../alsa-base_1.0.25+dfsg-0ubuntu1.1_all.deb) ...

Unpacking replacement alsa-base ...

Preparing to replace firefox-globalmenu 19.0+build1-0ubuntu0.12.04.2 (using .../firefox-globalmenu_19.0.2+build1-0ubuntu0.12.04.1_i386.deb) ...

Unpacking replacement firefox-globalmenu ...

Preparing to replace firefox 19.0+build1-0ubuntu0.12.04.2 (using .../firefox_19.0.2+build1-0ubuntu0.12.04.1_i386.deb) ...

Unpacking replacement firefox ...

dpkg-deb (subprocess): data: internal gzip read error: '<fd:4>: data error'

dpkg-deb: error: subprocess <decompress> returned error exit status 2

dpkg: error processing /var/cache/apt/archives/firefox_19.0.2+build1-0ubuntu0.12.04.1_i386.deb (--unpack):

 subprocess dpkg-deb --fsys-tarfile returned error exit status 2

No apport report written because MaxReports is reached already
Please restart all running instances of firefox, or you will experience problems.

Preparing to replace firefox-gnome-support 19.0+build1-0ubuntu0.12.04.2 (using .../firefox-gnome-support_19.0.2+build1-0ubuntu0.12.04.1_i386.deb) ...

Unpacking replacement firefox-gnome-support ...

Preparing to replace firefox-locale-de 19.0+build1-0ubuntu0.12.04.2 (using .../firefox-locale-de_19.0.2+build1-0ubuntu0.12.04.1_i386.deb) ...

Unpacking replacement firefox-locale-de ...

Preparing to replace firefox-locale-en 19.0+build1-0ubuntu0.12.04.2 (using .../firefox-locale-en_19.0.2+build1-0ubuntu0.12.04.1_i386.deb) ...

Unpacking replacement firefox-locale-en ...

Preparing to replace firefox-locale-es 19.0+build1-0ubuntu0.12.04.2 (using .../firefox-locale-es_19.0.2+build1-0ubuntu0.12.04.1_i386.deb) ...

Unpacking replacement firefox-locale-es ...

Preparing to replace firefox-locale-pt 19.0+build1-0ubuntu0.12.04.2 (using .../firefox-locale-pt_19.0.2+build1-0ubuntu0.12.04.1_i386.deb) ...

Unpacking replacement firefox-locale-pt ...

Preparing to replace firefox-locale-zh-hans 19.0+build1-0ubuntu0.12.04.2 (using .../firefox-locale-zh-hans_19.0.2+build1-0ubuntu0.12.04.1_i386.deb) ...

Unpacking replacement firefox-locale-zh-hans ...

Preparing to replace im-switch 1.20ubuntu5.1 (using .../im-switch_1.20ubuntu5.2_all.deb) ...

update-alternatives: using /etc/X11/xinit/xinput.d/default-xim to provide /etc/X11/xinit/xinput.d/all_ALL (xinput-all_ALL) in auto mode.

update-alternatives: using /etc/X11/xinit/xinput.d/none to provide /etc/X11/xinit/xinput.d/all_ALL (xinput-all_ALL) in auto mode.

update-alternatives: using /etc/X11/xinit/xinput.d/th-gtk to provide /etc/X11/xinit/xinput.d/th_TH (xinput-th_TH) in auto mode.

Unpacking replacement im-switch ...

Preparing to replace libnm-gtk-common 0.9.4.1-0ubuntu2 (using .../libnm-gtk-common_0.9.4.1-0ubuntu2.1_all.deb) ...

Unpacking replacement libnm-gtk-common ...

Preparing to replace libnm-gtk0 0.9.4.1-0ubuntu2 (using .../libnm-gtk0_0.9.4.1-0ubuntu2.1_i386.deb) ...

Unpacking replacement libnm-gtk0 ...

Preparing to replace network-manager-gnome 0.9.4.1-0ubuntu2 (using .../network-manager-gnome_0.9.4.1-0ubuntu2.1_i386.deb) ...

Unpacking replacement network-manager-gnome ...

Preparing to replace thunderbird-globalmenu 17.0.3+build1-0ubuntu0.12.04.1 (using .../thunderbird-globalmenu_17.0.4+build1-0ubuntu0.12.04.1_i386.deb) ...

Unpacking replacement thunderbird-globalmenu ...

Preparing to replace thunderbird 17.0.3+build1-0ubuntu0.12.04.1 (using .../thunderbird_17.0.4+build1-0ubuntu0.12.04.1_i386.deb) ...

Unpacking replacement thunderbird ...

Preparing to replace thunderbird-gnome-support 17.0.3+build1-0ubuntu0.12.04.1 (using .../thunderbird-gnome-support_17.0.4+build1-0ubuntu0.12.04.1_i386.deb) ...

Unpacking replacement thunderbird-gnome-support ...

Preparing to replace xserver-common 2:1.11.4-0ubuntu10.11 (using .../xserver-common_2%%3a1.11.4-0ubuntu10.12_all.deb) ...

Unpacking replacement xserver-common ...

Preparing to replace xserver-xorg-core 2:1.11.4-0ubuntu10.11 (using .../xserver-xorg-core_2%%3a1.11.4-0ubuntu10.12_i386.deb) ...

Unpacking replacement xserver-xorg-core ...

Preparing to replace aptdaemon-data 0.43+bzr805-0ubuntu7 (using .../aptdaemon-data_0.43+bzr805-0ubuntu8_all.deb) ...

Unpacking replacement aptdaemon-data ...

Preparing to replace python-aptdaemon-gtk 0.43+bzr805-0ubuntu7 (using .../python-aptdaemon-gtk_0.43+bzr805-0ubuntu8_all.deb) ...

Unpacking replacement python-aptdaemon-gtk ...

Preparing to replace python-aptdaemon.gtk3widgets 0.43+bzr805-0ubuntu7 (using .../python-aptdaemon.gtk3widgets_0.43+bzr805-0ubuntu8_all.deb) ...

Unpacking replacement python-aptdaemon.gtk3widgets ...

Preparing to replace python-aptdaemon.gtkwidgets 0.43+bzr805-0ubuntu7 (using .../python-aptdaemon.gtkwidgets_0.43+bzr805-0ubuntu8_all.deb) ...

Unpacking replacement python-aptdaemon.gtkwidgets ...

Preparing to replace python-aptdaemon.pkcompat 0.43+bzr805-0ubuntu7 (using .../python-aptdaemon.pkcompat_0.43+bzr805-0ubuntu8_all.deb) ...

Unpacking replacement python-aptdaemon.pkcompat ...

Preparing to replace aptdaemon 0.43+bzr805-0ubuntu7 (using .../aptdaemon_0.43+bzr805-0ubuntu8_all.deb) ...

Unpacking replacement aptdaemon ...

Preparing to replace python-aptdaemon 0.43+bzr805-0ubuntu7 (using .../python-aptdaemon_0.43+bzr805-0ubuntu8_all.deb) ...

Unpacking replacement python-aptdaemon ...

Processing triggers for man-db ...

Processing triggers for desktop-file-utils ...

Processing triggers for gnome-menus ...

Processing triggers for bamfdaemon ...

Rebuilding /usr/share/applications/bamf.index...

Processing triggers for hicolor-icon-theme ...

Processing triggers for gconf2 ...

Errors were encountered while processing:

 /var/cache/apt/archives/firefox_19.0.2+build1-0ubuntu0.12.04.1_i386.deb

Error in function: 

Setting up xserver-common (2:1.11.4-0ubuntu10.12) ...

Setting up python-aptdaemon (0.43+bzr805-0ubuntu8) ...

Setting up python-aptdaemon.pkcompat (0.43+bzr805-0ubuntu8) ...

Setting up aptdaemon-data (0.43+bzr805-0ubuntu8) ...

dpkg: dependency problems prevent configuration of firefox-globalmenu:

 firefox-globalmenu depends on firefox (= 19.0.2+build1-0ubuntu0.12.04.1); however:

  Version of firefox on system is 19.0+build1-0ubuntu0.12.04.2.

dpkg: error processing firefox-globalmenu (--configure):

 dependency problems - leaving unconfigured

Setting up xserver-xorg-core (2:1.11.4-0ubuntu10.12) ...

Setting up apt-transport-https (0.8.16~exp12ubuntu10.9) ...

Setting up python-aptdaemon.gtk3widgets (0.43+bzr805-0ubuntu8) ...

Setting up libapt-inst1.4 (0.8.16~exp12ubuntu10.9) ...

Setting up thunderbird (17.0.4+build1-0ubuntu0.12.04.1) ...

Setting up libnm-gtk-common (0.9.4.1-0ubuntu2.1) ...

Setting up thunderbird-gnome-support (17.0.4+build1-0ubuntu0.12.04.1) ...

Setting up firefox-locale-de (19.0.2+build1-0ubuntu0.12.04.1) ...

Setting up python-aptdaemon.gtkwidgets (0.43+bzr805-0ubuntu8) ...

Setting up libnm-gtk0 (0.9.4.1-0ubuntu2.1) ...

Setting up firefox-gnome-support (19.0.2+build1-0ubuntu0.12.04.1) ...

Setting up aptdaemon (0.43+bzr805-0ubuntu8) ...

Setting up python-aptdaemon-gtk (0.43+bzr805-0ubuntu8) ...

Setting up im-switch (1.20ubuntu5.2) ...

Installing new version of config file /etc/X11/Xsession.d/80im-switch ...

update-alternatives: using /etc/X11/xinit/xinput.d/default to provide /etc/X11/xinit/xinput.d/all_ALL (xinput-all_ALL) in auto mode.

update-alternatives: using /etc/X11/xinit/xinput.d/lo-gtk to provide /etc/X11/xinit/xinput.d/lo_TH (xinput-lo_TH) in auto mode.

update-alternatives: using /etc/X11/xinit/xinput.d/th-xim to provide /etc/X11/xinit/xinput.d/th_TH (xinput-th_TH) in auto mode.

Setting up firefox-locale-zh-hans (19.0.2+build1-0ubuntu0.12.04.1) ...

Setting up firefox-locale-es (19.0.2+build1-0ubuntu0.12.04.1) ...

Setting up firefox-locale-en (19.0.2+build1-0ubuntu0.12.04.1) ...

Setting up apt-utils (0.8.16~exp12ubuntu10.9) ...

Setting up network-manager-gnome (0.9.4.1-0ubuntu2.1) ...

Setting up linux-sound-base (1.0.25+dfsg-0ubuntu1.1) ...

Setting up firefox-locale-pt (19.0.2+build1-0ubuntu0.12.04.1) ...

Setting up thunderbird-globalmenu (17.0.4+build1-0ubuntu0.12.04.1) ...

Setting up alsa-base (1.0.25+dfsg-0ubuntu1.1) ...

Processing triggers for libc-bin ...

ldconfig deferred processing now taking place



--- On Tue, 3/12/13, Ubuntu Foundations Team Bug Bot <email address hidden> wrote:

From: Ubuntu Foundations Team Bug Bot <email address hidden>
Subject: [Bug 1154241] Re: update manager error
To: <email address hidden>
Date: Tuesday, March 12, 2013, 8:17 PM

*** This bug is a duplicate of bug 346386 ***
    https://bugs.launchpad.net/bugs/346386

Thank you for taking the time to report this bug and helping to make
Ubuntu better.  Reviewing your bug report it seems that you are
experiencing bug 346386.  This issue happens when you have tried to
update your package information when you are a network that didn't
return the right files.  This issue can be cleaned up by using the
following commands in a terminal:

1.) sudo rm /var/lib/apt/lists/*
2.) sudo apt-get update

Thanks and good luck!

[This is an automated message.  I apologize if it reached you
inappropriately; please reopen the bug task if it was incorrect.]

** This bug has been marked a duplicate of bug 346386
   [MASTER] Update fails with invalid package files with "Encountered a section with no Package: header"

** Tags added: bot-comment

-- 
You received this bug notification because you are subscribed to the bug
report.
https://bugs.launchpad.net/bugs/1154241

Title:
  update manager error

Status in “apt” package in Ubuntu:
  New

Bug description:
  hi i was updating ubuntu 12.04 and came across this error

  An unresolvable problem occurred while initializing the package
  information.

  Please report this bug against the 'update-manager' package and include the following error message
  E:Encountered a section with no Package: header, E:Problem with MergeList /var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-updates_main_i18n_Translation-en, E:The package lists or status file could not be parsed or opened.'

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