Ubiquity failed at the end of install process Ubuntu 9.04/9.10

[niniadcobre]

Binary package hint: ubiquity

I'm using a Live CD, almost at the end of the installation process the installer just close up and a crash report is highlighted as an icon on the system bar.
After that the system is not able to boot.
I've specified my old home directory (sda7) (from LTS 8.04) as current home, you could see from messages pasted below that there is a problem when trying to use the mount point /mnt/migrationassistant/home.

Iubuntu@ubuntu:~$ lsb_release -rd
Description: Ubuntu 9.04
Release: 9.04

[from messages]
Oct 31 18:56:36 ubuntu 50mounted-tests: debug: running subtest /usr/lib/os-probes/mounted/40lsb
Oct 31 18:56:36 ubuntu 50mounted-tests: debug: running subtest /usr/lib/os-probes/mounted/70hurd
Oct 31 18:56:36 ubuntu 50mounted-tests: debug: running subtest /usr/lib/os-probes/mounted/80minix
Oct 31 18:56:36 ubuntu 50mounted-tests: debug: running subtest /usr/lib/os-probes/mounted/90linux-distro
Oct 31 18:56:36 ubuntu 50mounted-tests: debug: running subtest /usr/lib/os-probes/mounted/90solaris
Oct 31 18:56:36 ubuntu os-prober: debug: running /usr/lib/os-probes/mounted/10freedos on mounted /dev/sda7
Oct 31 18:56:36 ubuntu 10freedos: debug: /dev/sda7 is not a FAT partition: exiting
Oct 31 18:56:36 ubuntu os-prober: debug: running /usr/lib/os-probes/mounted/10qnx on mounted /dev/sda7
Oct 31 18:56:36 ubuntu 10qnx: debug: /dev/sda7 is not a QNX4 partition: exiting
Oct 31 18:56:36 ubuntu os-prober: debug: running /usr/lib/os-probes/mounted/20macosx on mounted /dev/sda7
Oct 31 18:56:36 ubuntu macosx-prober: debug: /dev/sda7 is not an HFS+ partition: exiting
Oct 31 18:56:36 ubuntu os-prober: debug: running /usr/lib/os-probes/mounted/20microsoft on mounted /dev/sda7
Oct 31 18:56:36 ubuntu 20microsoft: debug: /dev/sda7 is not a MS partition: exiting
Oct 31 18:56:36 ubuntu os-prober: debug: running /usr/lib/os-probes/mounted/30utility on mounted /dev/sda7
Oct 31 18:56:36 ubuntu 30utility: debug: /dev/sda7 is not a FAT partition: exiting
Oct 31 18:56:36 ubuntu os-prober: debug: running /usr/lib/os-probes/mounted/40lsb on mounted /dev/sda7
Oct 31 18:56:36 ubuntu 40lsb: result: /dev/sda7:Ubuntu 8.04.3 LTS (8.04):Ubuntu:linux
Oct 31 18:56:36 ubuntu os-prober: debug: os detected by /usr/lib/os-probes/mounted/40lsb
Oct 31 18:56:36 ubuntu kernel: [ 1030.871602] kjournald starting. Commit interval 5 seconds
Oct 31 18:56:36 ubuntu kernel: [ 1030.871758] EXT3 FS on sda7, internal journal
Oct 31 18:56:36 ubuntu kernel: [ 1030.871764] EXT3-fs: mounted filesystem with ordered data mode.
Oct 31 18:56:36 ubuntu ubiquity: mount: mount point /mnt/migrationassistant/home does not exist
Oct 31 18:56:36 ubuntu ubiquity: umount: /mnt/migrationassistant: device is busy.
Oct 31 18:56:36 ubuntu ubiquity: (In some cases useful info about processes that use
Oct 31 18:56:36 ubuntu ubiquity: the device is found by lsof(8) or fuser(1))
Oct 31 18:56:51 ubuntu ubiquity: umount: /mnt/migrationassistant: device is busy.
Oct 31 18:56:51 ubuntu ubiquity: (In some cases useful info about processes that use
Oct 31 18:56:51 ubuntu ubiquity: the device is found by lsof(8) or fuser(1))
Oct 31 18:56:51 ubuntu ubiquity: return: 74:
Oct 31 18:56:51 ubuntu ubiquity: Illegal number: #
Oct 31 18:56:51 ubuntu ubiquity:
Oct 31 18:56:51 ubuntu python: log-output -t ubiquity umount /target/cdrom
Oct 31 18:56:51 ubuntu finish-install: Disabling CD in sources.list
Oct 31 18:57:02 ubuntu kernel: [ 1057.076168] lp0: using parport0 (interrupt-driven).

ProblemType: Crash
Architecture: i386
DistroRelease: Ubuntu 9.04
ExecutablePath: /usr/lib/ubiquity/bin/ubiquity
InterpreterPath: /usr/bin/python2.6
MediaBuild: Ubuntu 9.04 "Jaunty Jackalope" - Release i386 (20090420.1)
Package: ubiquity 1.12.12
ProcAttrCurrent: unconfined
ProcCmdline: /usr/bin/python /usr/lib/ubiquity/bin/ubiquity --only
ProcEnviron:
 LANGUAGE=
 PATH=(custom, no user)
 LANG=en_US.UTF-8
PythonArgs: ['/usr/lib/ubiquity/bin/ubiquity', '--only']
SourcePackage: ubiquity
Title: ubiquity crashed with InstallStepError in configure_ma()
Uname: Linux 2.6.28-11-generic i686
UserGroups:

[niniadcobre (lechnermiriam)]

Same thing happens on Karmic Koala 9.10.
I realize the problems is that I had a backup from my old /etc in my /home partition. For some strange reason, even when I set / in a different partition and ask the installer do not use my old home partition (not set as mount point for /home either), the migration manager software tried to do something with this backup and that is why the installer fails.
After create a tgz file of my /home/etc, the migration manager did not detect my backup and the installation ends successfully.

Regards,
niniadcobre

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make Ubuntu better. This particular crash has already been reported and is a duplicate of bug #234835, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.