Installer crashes

[Iain]

When trying to install either straight away or from live environment, installer crashes.
USB key has sucessfully been used on other machines and is still working on other machines so installation media not corrupt.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: ubiquity 2.12.14
ProcVersionSignature: Ubuntu 3.5.0-17.28-generic 3.5.5
Uname: Linux 3.5.0-17-generic i686
ApportVersion: 2.6.1-0ubuntu3
Architecture: i386
CasperVersion: 1.328
Date: Thu Mar 14 14:31:25 2013
InstallCmdLine: initrd=/casper/initrd.lz file=/cdrom/preseed/ubuntu.seed boot=casper quiet splash -- BOOT_IMAGE=/casper/vmlinuz
LiveMediaBuild: Ubuntu GNOME Remix 12.10 "Quantal Quetzal" - Release i386(20121018)
ProcEnviron:
 LANGUAGE=en_GB.UTF-8
 TERM=unknown
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Ubuntu Foundations Team Bug Bot (crichton)]

Exception during installation:
Mar 14 14:31:09 gnome plugininstall.py: Traceback (most recent call last):
Mar 14 14:31:09 gnome plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 1731, in <module>
Mar 14 14:31:09 gnome plugininstall.py: install.run()
Mar 14 14:31:09 gnome plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 81, in wrapper
Mar 14 14:31:09 gnome plugininstall.py: func(self)
Mar 14 14:31:09 gnome plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 195, in run
Mar 14 14:31:09 gnome plugininstall.py: self.configure_python()
Mar 14 14:31:09 gnome plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 340, in configure_python
Mar 14 14:31:09 gnome plugininstall.py: cache = Cache()
Mar 14 14:31:09 gnome plugininstall.py: File "/usr/lib/python3/dist-packages/apt/cache.py", line 102, in __init__
Mar 14 14:31:09 gnome plugininstall.py: self.open(progress)
Mar 14 14:31:09 gnome plugininstall.py: File "/usr/lib/python3/dist-packages/apt/cache.py", line 145, in open
Mar 14 14:31:09 gnome plugininstall.py: self._cache = apt_pkg.Cache(progress)
Mar 14 14:31:09 gnome plugininstall.py: SystemError: E:Malformed Description-md5 line; doesn't have the required length (32 != 81) '09c3f8ac2909eee32f51ee7442c8bfff#032Bugs: https://bugs.launchpad.net/ubuntu/+filebug', E:The package lists or status file could not be parsed or opened.
Mar 14 14:31:09 gnome plugininstall.py:

[Marcus Tomlinson (marcustomlinson)]

This release of Ubuntu is no longer receiving maintenance updates. If this is still an issue on a maintained version of Ubuntu please let us know.

[Launchpad Janitor (janitor)]

[Expired for ubiquity (Ubuntu) because there has been no activity for 60 days.]