python3-uno postinst fails, preventing install

[harry cover]

/var/log/partman : http://paste.ubuntu.com/8897911/
/var/log/syslog : attached

I started Ubuntu live form my USB key, and I clicked on Install Ubuntu 14.10 from the live mode. I checked the two boxes (upgrades and codecs), and I chose Reinstall Ubuntu 14.10 because my GRUB wasn't working fine. I checked encrypt my personal folder and I chose the same username I had. The last time I looked at it before it crashed, it was downloading the updates ( I think it was doing apt-get update). Then, it crashed.

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: ubiquity 2.20.0
ProcVersionSignature: Ubuntu 3.16.0-23.31-generic 3.16.4
Uname: Linux 3.16.0-23-generic i686
ApportVersion: 2.14.7-0ubuntu8
Architecture: i386
CasperVersion: 1.345
Date: Sun Nov 9 00:10:17 2014
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz initrd=/casper/initrd.lz file=/cdrom/preseed/ubuntu.seed boot=casper quiet splash -- persistent
LiveMediaBuild: Ubuntu 14.10 "Utopic Unicorn" - Release i386 (20141022.1)
ProcEnviron:
 LANGUAGE=fr_FR.UTF-8
 PATH=(custom, no user)
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Ubuntu Foundations Team Bug Bot (crichton)]

Exception during installation:
Nov 8 23:08:40 ubuntu /plugininstall.py: SystemError: E:Sub-process /usr/bin/dpkg returned an error code (1)
Nov 8 23:08:40 ubuntu /plugininstall.py:

[Brian Murray (brian-murray)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. Reviewing your log files attached to this bug report it seems that there is a problem with your installation media (CD/DVD). You can verify the integrity of the Ubuntu ISO files you downloaded by following the instructions at https://help.ubuntu.com/community/HowToMD5SUM. You might also retry your installation with new media and if that still fails I'd recommend testing your CD drive with other media. In the event that is is not in fact an error with your installation media or hardware please set the bug's status back to New. Thanks and good luck!