Comment 0 for bug 948461

apt-get is appears to be mangling the local caching file names, which is appearing as a hashsum or size mismatch.

Evidence below:

apt-get -y install firefox with debug for HTTP turned on:
___________________________________________________________________________________________________________________
Get:63 http://us-east-1.ec2.archive.ubuntu.com.s3.amazonaws.com/ubuntu/ precise/main python-defer all 1.0.2+bzr481-1 [10.9 kB]
HTTP/1.1 200 OK^M
x-amz-id-2: EXccd6GVMfE6ly4SYdwy313VK42d/gI3ncyxmaotuVIMbBBi6FJkuDYWrzLw7vXE^M
x-amz-request-id: 7572BAB5E6FFFAC0^M
Date: Tue, 06 Mar 2012 20:06:13 GMT^M
Last-Modified: Fri, 03 Feb 2012 08:54:27 GMT^M
ETag: "6c07f8db615cc32657b1cc57450a1608"^M
Accept-Ranges: bytes^M
Content-Type: application/x-debian-package^M
Content-Length: 15142^M
Server: AmazonS3^M
^M
Get:64 http://us-east-1.ec2.archive.ubuntu.com.s3.amazonaws.com/ubuntu/ precise/main python-aptdaemon all 0.43+bzr769-0ubuntu1 [80.3 kB]
HTTP/1.1 200 OK^M
x-amz-id-2: IcNECY1OtzHOXnTnTW3fqoJGyfdODq+qRXXGYTDEOJxfw0CP9UH8EUSllVR3Gf3F^M
x-amz-request-id: 5DEEEE629E3BA012^M
Date: Tue, 06 Mar 2012 20:06:13 GMT^M
Last-Modified: Fri, 02 Mar 2012 20:55:40 GMT^M
ETag: "501373631a241847cf76d13aea9264b3"^M
Accept-Ranges: bytes^M
Content-Type: application/x-debian-package^M
Content-Length: 56824^M
Server: AmazonS3^M
^M
Get:65 http://us-east-1.ec2.archive.ubuntu.com.s3.amazonaws.com/ubuntu/ precise/main aptdaemon all 0.43+bzr769-0ubuntu1 [15.1 kB]
HTTP/1.1 200 OK^M
x-amz-id-2: HHNSOZKH74D4I1XCaOiwDOzIWxIVJ88ibfKxvIp/4NpkczzPmsOhMqxrTj2T02qO^M
x-amz-request-id: A6FD3143E6A0BA1A^M
Date: Tue, 06 Mar 2012 20:06:34 GMT^M
Last-Modified: Sat, 21 Jan 2012 00:48:55 GMT^M
ETag: "3653165af1f20a437a14632ce0a2e6c2"^M
Accept-Ranges: bytes^M
Content-Type: application/x-debian-package^M
Content-Length: 10902^M
Server: AmazonS3^M

___________________________________________________________________________________________________________
Evaluation of the MD5sums of downloaded failed items:
root@ip-10-6-85-206:/var/cache/apt/archives/partial# md5sum *
501373631a241847cf76d13aea9264b3 aptdaemon_0.43+bzr769-0ubuntu1_all.deb
6c07f8db615cc32657b1cc57450a1608 python-aptdaemon_0.43+bzr769-0ubuntu1_all.deb
566f7c92a9fcd0c5c40d08a977176291 python-defer_1.0.2+bzr481-1_all.deb
3653165af1f20a437a14632ce0a2e6c2 xul-ext-ubufox_2.0-0ubuntu1_all.deb

___________________________________________________________________________________________________________
Snipets from Packages.bz2
From Meta-data:
  Package: aptdaemon
  MD5sum: 6c07f8db615cc32657b1cc57450a1608

  Package: xul-ext-ubufox
  MD5sum: 501373631a241847cf76d13aea9264b3

  Package: python-aptdaemon
  MD5sum: 566f7c92a9fcd0c5c40d08a977176291

  Package: python-defer
  MD5sum: 3653165af1f20a437a14632ce0a2e6c2

___________________________________________________________________________________________________________
"dpkg -i" on pacakges downloaded

root@ip-10-6-85-206:/var/cache/apt/archives/partial# dpkg -I aptdaemon_0.43+bzr769-0ubuntu1_all.deb
 new debian package, version 2.0.
 size 56824 bytes: control archive= 1520 bytes.
      23 bytes, 1 lines conffiles
    1023 bytes, 29 lines control
    1804 bytes, 21 lines md5sums
 Package: xul-ext-ubufox
 Source: ubufox
 Version: 2.0-0ubuntu1
 Architecture: all
 Maintainer: Ubuntu Mozilla Team <email address hidden>
 Installed-Size: 383
 Depends: aptdaemon, libglib2.0-0 (>= 2.26)
 Recommends: firefox (>= 4.0~b6)
 Enhances: firefox
 Breaks: ubufox (<< 0.9~rc2-0ubuntu3)a
 Replaces: ubufox (<< 0.9~rc2-0ubuntu3)
 Provides: firefox-ubufox, ubufox
 Section: web
 Priority: optional
 Homepage: https://launchpad.net/ubufox
 Description: Ubuntu-specific configuration defaults and apt support for Firefox
  Adds Ubuntu-specific modifications to Firefox.
  .
  Integrates the browser with Ubuntu to:
   * Enable searching for missing plugins from Ubuntu software catalog
   * Add the following options to the Help menu
     - Get help on-line
     - Help translating Firefox
     - Ubuntu Release Notes
   * Set homepage to Ubuntu Start Page
   * Display a restart notification after upgrading Firefox
   * Add ask.com to the search engines.
  .
  You can uninstall this if you prefer to use a pristine Firefox install.

root@ip-10-6-85-206:/var/cache/apt/archives/partial# dpkg -I python-aptdaemon_0.43+bzr769-0ubuntu1_all.deb
 new debian package, version 2.0.
 size 15142 bytes: control archive= 1508 bytes.
      68 bytes, 2 lines conffiles
    1390 bytes, 30 lines control
    1088 bytes, 15 lines md5sums
 Package: aptdaemon
 Version: 0.43+bzr769-0ubuntu1
 Architecture: all
 Maintainer: Ubuntu Developers <email address hidden>
 Installed-Size: 188
 Depends: python, python-aptdaemon (= 0.43+bzr769-0ubuntu1), python-gi, gir1.2-glib-2.0
 Breaks: software-center (<< 1.1.21)
 Section: admin
 Priority: extra
 Homepage: https://launchpad.net/aptdaemon
 Description: transaction based package management service
  Aptdaemon allows normal users to perform package management tasks, e.g.
  refreshing the cache, upgrading the system, installing or removing software
  packages.
  .
  Currently it comes with the following main features:
  .
   - Programming language independent D-Bus interface, which allows one to
     write clients in several languages
   - Runs only if required (D-Bus activation)
   - Fine grained privilege management using PolicyKit, e.g. allowing all
     desktop user to query for updates without entering a password
   - Support for media changes during installation from DVD/CDROM
   - Support for debconf (Debian's package configuration system)
   - Support for attaching a terminal to the underlying dpkg call
  .
  This package contains the aptd script and all the data files required to run
  the daemon. Moreover it contains the aptdcon script, which is a command
  line client for aptdaemon. The API is not stable yet.
 Original-Maintainer: Julian Andres Klode <email address hidden>

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: apt 0.8.16~exp12ubuntu4
ProcVersionSignature: Ubuntu 3.2.0-18.28-virtual 3.2.9
Uname: Linux 3.2.0-18-virtual x86_64
ApportVersion: 1.94-0ubuntu1
Architecture: amd64
Date: Tue Mar 6 21:21:17 2012
Ec2AMI: ami-0400dd6d
Ec2AMIManifest: (unknown)
Ec2AvailabilityZone: us-east-1c
Ec2InstanceType: m1.large
Ec2Kernel: aki-825ea7eb
Ec2Ramdisk: unavailable
SourcePackage: apt
UpgradeStatus: No upgrade log present (probably fresh install)