The installer crashed without any useful information and automatic bug report process started.
My understanding that the log will be attached automatically since I have no idea where was it stored.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: ubiquity 2.9.24
ProcVersionSignature: Ubuntu 3.2.0-17.27-generic-pae 3.2.6
Uname: Linux 3.2.0-17-generic-pae i686
ApportVersion: 1.94-0ubuntu1
Architecture: i386
CasperVersion: 1.305
Date: Sun Jun 17 14:15:37 2012
InstallCmdLine: initrd=/casper/initrd.lz file=/cdrom/preseed/ubuntu.seed boot=casper only-ubiquity quiet splash -- BOOT_IMAGE=/casper/vmlinuz
LiveMediaBuild: Ubuntu 12.04 LTS "Precise Pangolin" - Beta i386 (20120301)
ProcEnviron:
LANGUAGE=
TERM=linux
PATH=(custom, no user)
LANG=en_US.UTF-8
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)
Reviewing your installation log file it appears that your installation media contains some strange data which is causing the installation to fail. The standard Ubuntu installation media (and that of supported derivatives) does not include this data and will not fail in this way, so it must be an issue with the way the installation media was prepared. Subsequently, this bug report is Invalid but it would be useful to know what tool you prepared the installation media. Additionally, to resolve the issue you may want to try fully erasing the USB drive which contains the installer before recreating it. Thanks and good luck!