Installer crashed during fresh install on Dell Ibspiron laptop

[Jonathan Duddington]

The last message which the installer displayed was:
"Checking for packages to install"

Installation was from a Kubuntu 11.10 amd64 desktop CD, into a ext3 partition (for '/'). The original Windows partitions were present, with the main Windows partition reduced in size.

Internet access by ethernet was connected and working.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: ubiquity 2.8.7
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
Uname: Linux 3.0.0-12-generic x86_64
ApportVersion: 1.23-0ubuntu3
Architecture: amd64
CasperVersion: 1.287
Date: Thu Dec 1 11:29:51 2011
LiveMediaBuild: Kubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
ProcEnviron:
 LANGUAGE=
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Ubuntu Foundations Team Bug Bot (crichton)]

Exception during installation:
Dec 1 10:53:27 ubuntu plugininstall.py: Traceback (most recent call last):
Dec 1 10:53:27 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 1641, in <module>
Dec 1 10:53:27 ubuntu plugininstall.py: install.run()
Dec 1 10:53:27 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 55, in wrapper
Dec 1 10:53:27 ubuntu plugininstall.py: func(self)
Dec 1 10:53:27 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 169, in run
Dec 1 10:53:27 ubuntu plugininstall.py: self.install_language_packs()
Dec 1 10:53:27 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 613, in install_language_packs
Dec 1 10:53:27 ubuntu plugininstall.py: self.do_install(self.langpacks, langpacks=True)
Dec 1 10:53:27 ubuntu plugininstall.py: File "/usr/lib/ubiquity/ubiquity/install_misc.py", line 716, in do_install
Dec 1 10:53:27 ubuntu plugininstall.py: mark_install(cache, pkg)
Dec 1 10:53:27 ubuntu plugininstall.py: File "/usr/lib/ubiquity/ubiquity/install_misc.py", line 489, in mark_install
Dec 1 10:53:27 ubuntu plugininstall.py: assert cache._depcache.broken_count == 0
Dec 1 10:53:27 ubuntu plugininstall.py: AssertionError
Dec 1 10:53:27 ubuntu plugininstall.py: