Kubuntu installer crashes after copying files

[Michael]

I am can not install Kubuntu newer than 12.04 (i.e. 13.04 - 14.04 testing). The installer crashes after copying files, on configuring step. It shows me a window where "ubuntu-bug ubiquity" command is suggested and all installer windows just disappears in few seconds.
Note: this time I tried to install development preview of Kubuntu, installer silently crashed first time at manual partitioning page. My second try ended with same behaviour I saw in 13.04 and 13.10 installers.
Please ask any further information. This is first time I reporting a bug on Launchpad.

lsb_release -rd:
Description: Ubuntu Trusty Tahr (development branch)
Release: 14.04

apt-cache policy ubiquity:
ubiquity:
  Installed: 2.17.2
  Candidate: 2.17.4
  Version table:
     2.17.4 0
        500 http://archive.ubuntu.com/ubuntu/ trusty/main i386 Packages
 *** 2.17.2 0
        100 /var/lib/dpkg/status

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubiquity 2.17.2 [modified: lib/partman/automatically_partition/question]
ProcVersionSignature: Ubuntu 3.12.0-7.15-generic 3.12.4
Uname: Linux 3.12.0-7-generic i686
ApportVersion: 2.12.7-0ubuntu2
Architecture: i386
CasperVersion: 1.336ubuntu1
Date: Sun Feb 2 20:18:25 2014
InstallCmdLine: noprompt cdrom-detect/try-usb=true persistent file=/cdrom/preseed/kubuntu.seed boot=casper maybe-ubiquity initrd=/casper/initrd.lz quiet splash -- maybe-ubiquity
LiveMediaBuild: Kubuntu 14.04 LTS "Trusty Tahr" - Alpha i386 (20131219)
ProcEnviron:
 LANGUAGE=en
 TERM=xterm
 PATH=(custom, no user)
 LANG=ru_RU.UTF-8
 SHELL=/bin/bash
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[jmrasor (jmrasor)]

I think my mistake may have been not formatting the partition with the old 12.04 on it. I'm going to give it another go, on the same partition formatted.

[jmrasor (jmrasor)]

I re-installed on the same partition, formatting it this time. The installation finished with no errors.
Now I will try re-installing it on this same partition, without formatting. This means trying to install 14.04 over 14.04.

[jmrasor (jmrasor)]

Re-installed Kubuntu 14.04 over 14.04, same partition, without formatting. Same error restoring previously installed packages at 93% completion, same crash. Boot to the new 14.04: Seems OK; it's helping me do this.

[Marcus Tomlinson (marcustomlinson)]

This release of Ubuntu is no longer receiving maintenance updates. If this is still an issue on a maintained version of Ubuntu please let us know.

[Launchpad Janitor (janitor)]

[Expired for ubiquity (Ubuntu) because there has been no activity for 60 days.]