ubiquity crashed with IndexError in render_slider()

[eldad]

Binary package hint: ubiquity

ubuntu@ubuntu:~$ lsb_release -rd
Description: Ubuntu karmic (development branch)
Release: 9.10

ubuntu@ubuntu:~$ apt-cache policy ubiquity
ubiquity:
  Installed: 1.99.6
  Candidate: 1.99.6
  Version table:
 *** 1.99.6 0
        500 http://archive.ubuntu.com karmic/main Packages
        100 /var/lib/dpkg/status

ProblemType: Crash
Architecture: amd64
Date: Tue Aug 18 07:45:19 2009
DistroRelease: Ubuntu 9.10
ExecutablePath: /usr/lib/ubiquity/bin/ubiquity
InterpreterPath: /usr/bin/python2.6
LiveMediaBuild: Ubuntu 9.10 "Karmic Koala" - Alpha amd64 (20090812.3)
Package: ubiquity 1.99.6
ProcCmdline: /usr/bin/python /usr/lib/ubiquity/bin/ubiquity gtk_ui
ProcEnviron: Error: [Errno 13] Permission denied: '/proc/5852/environ'
ProcVersionSignature: Ubuntu 2.6.31-5.24-generic
PythonArgs: ['/usr/lib/ubiquity/bin/ubiquity', 'gtk_ui']
SourcePackage: ubiquity
Title: ubiquity crashed with IndexError in render_slider()
Uname: Linux 2.6.31-5-generic x86_64
UserGroups:

[eldad (eldad-a)]

after reading the so-called duplicate, I believe it is not.
this happened upon reaching the partition editing stage in the installation process.
seems irrelevant to the grub2 as mentioned in the so-called duplicate.

I believe the problem is related to resizing of existing partitions, but cannot say for sure as I did that bit manually (installation succeded).

[eldad (eldad-a)]

this bug is rather similar to what was reported earlier in https://bugs.launchpad.net/bugs/386388
noting the following differences:
here the installation was done using an unmodified iso of alpha-4, from a bootable-usb.
the crash appeared when the partitioning stage was arrived (ie before choosing manual partitioning).