Crash during installation

[JohnWashington]

Using daily build (6 apr 2012) on a new pc, no previous installation. Copying files had probably completed. Syslog indicates a problem with flash plugin installer. Perhaps noteworthy that I had earlier clicked on the scrolling twitter-feed in the welcome slides and as a result brought up Firefox.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: ubiquity 2.10.8
ProcVersionSignature: Ubuntu 3.2.0-22.35-generic-pae 3.2.14
Uname: Linux 3.2.0-22-generic-pae i686
ApportVersion: 2.0-0ubuntu4
Architecture: i386
CasperVersion: 1.314
Date: Fri Apr 6 19:30:04 2012
InstallCmdLine: file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash -- maybe-ubiquity
LiveMediaBuild: Ubuntu 12.04 LTS "Precise Pangolin" - Beta i386 (20120406)
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:
Apr 6 18:29:48 ubuntu plugininstall.py: SystemError: E:Sub-process /usr/bin/dpkg returned an error code (1)
Apr 6 18:29:48 ubuntu plugininstall.py:

[JohnWashington (ubuntu-johnwash)]

Reproduced without doing anything with the welcome slideshow, and without using Firefox. Same symptoms, syslog again indicates a problem with flash plugin installer, so my "noteworthy" comment in the description should be ignored.