[Bug 1088846] Re: I can not update my ubuntu 12.04

[MankyGitt]

UPDATE: Today I tried again and encountered the same error. I demonstrated this to some colleagues, and we tried downloading the package files from various mirrors. It seemed that one mirror was able to provide these files for download successfully, so  I changed repositories to the mirror.optus.com source and re-tried apt-get update && apt-get upgrade
The updates applied successfully with no errors. Go figure.

I'm not sure if a problem has been fixed and is being replicated out to
the various mirrors. I had previously tried this same mirror with no
success.

This issue can be marked as solved, but with no good explanation

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https://bugs.launchpad.net/bugs/1088846

Title:
  I can not update my ubuntu 12.04

Status in “update-manager” package in Ubuntu:
  Opinion

Bug description:
  Failed to download package files
  Check your Internet connection.
  details
  Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/libp/libproxy/libproxy1-plugin-networkmanager_0.4.7-0ubuntu4.1_i386.deb 403  Forbidden [IP: 91.189.92.184 80]
  Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/libp/libproxy/libproxy1-plugin-gsettings_0.4.7-0ubuntu4.1_i386.deb 403  Forbidden [IP: 91.189.92.184 80]
  Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/libp/libproxy/libproxy1_0.4.7-0ubuntu4.1_i386.deb 403  Forbidden [IP: 91.189.92.184 80]
  Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/libp/libproxy/python-libproxy_0.4.7-0ubuntu4.1_all.deb 403  Forbidden [IP: 91.189.92.184 80]

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: update-manager 1:0.156.14.11
  ProcVersionSignature: Ubuntu 3.2.0-32.51-generic-pae 3.2.30
  Uname: Linux 3.2.0-32-generic-pae i686
  NonfreeKernelModules: wl
  ApportVersion: 2.0.1-0ubuntu14
  Architecture: i386
  Date: Tue Dec 11 12:30:16 2012
  GsettingsChanges:
   com.ubuntu.update-manager first-run false
   com.ubuntu.update-manager launch-time 1355218293
   com.ubuntu.update-manager show-details true
   com.ubuntu.update-manager window-height 559
   com.ubuntu.update-manager window-width 600
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423)
  PackageArchitecture: all
  ProcEnviron:
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: update-manager
  Symptom: ubuntu-release-upgrader-core
  UpgradeStatus: No upgrade log present (probably fresh install)

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