installation crashed

[Michal]

a valina instalation after copying files it crashed

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: ubiquity 2.14.1
ProcVersionSignature: Ubuntu 3.8.0-16.26-generic 3.8.5
Uname: Linux 3.8.0-16-generic x86_64
ApportVersion: 2.9.2-0ubuntu5
Architecture: amd64
CasperVersion: 1.330
Date: Sun Apr 7 10:39:09 2013
InstallCmdLine: file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash -- maybe-ubiquity
LiveMediaBuild: Ubuntu 13.04 "Raring Ringtail" - Alpha amd64 (20130402.1)
MarkForUpload: True
ProcEnviron:
 TERM=linux
 PATH=(custom, no user)
 LANG=en_US.UTF-8
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Ubuntu Foundations Team Bug Bot (crichton)]

Exception during installation:
Apr 7 08:38:56 ubuntu /plugininstall.py: Traceback (most recent call last):
Apr 7 08:38:56 ubuntu /plugininstall.py: File "/usr/lib/ubiquity/ubiquity/install_misc.py", line 277, in pulse
Apr 7 08:38:56 ubuntu /plugininstall.py: AcquireProgress.pulse(self, owner)
Apr 7 08:38:56 ubuntu /plugininstall.py: File "/usr/lib/python3/dist-packages/apt/progress/text.py", line 187, in pulse
Apr 7 08:38:56 ubuntu /plugininstall.py: val += ' %sB' % apt_pkg.size_to_str(worker.current_size)
Apr 7 08:38:56 ubuntu /plugininstall.py: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xa0 in position 1: invalid start byte
Apr 7 08:38:56 ubuntu /plugininstall.py: