Installer crashes when creating or formatting partitions

Binary package hint: ubiquity

Unbuntu 6.06 LTS PPC Live CD

ubiquity 1.0.17

Crash report:

Traceback (most recent call last):
  File "/usr/bin/ubiquity", line 130, in ?
    install(sys.argv[1])
  File "/usr/bin/ubiquity", line 55, in install
    ret = wizard.run()
  File "/usr/lib/python2.4/site-packages/ubiquity/frontend/gtkui.py", line 266, in run
    self.process_step()
  File "/usr/lib/python2.4/site-packages/ubiquity/frontend/gtkui.py", line 755, in process_step
    self.mountpoints_to_summary()
  File "/usr/lib/python2.4/site-packages/ubiquity/frontend/gtkui.py", line 1101, in mountpoints_to_summary
    if partman_commit.PartmanCommit(self).run_command(auto_process=True) != 0:
  File "/usr/lib/python2.4/site-packages/ubiquity/filteredcommand.py", line 128, in run_command
    self.start(auto_process=auto_process)
  File "/usr/lib/python2.4/site-packages/ubiquity/filteredcommand.py", line 45, in start
    self.db = DebconfCommunicator(PACKAGE, cloexec=True)
  File "/usr/lib/python2.4/site-packages/debconf.py", line 125, in __init__
    write=self.dccomm.tochild)
  File "/usr/lib/python2.4/site-packages/debconf.py", line 48, in __init__
    self.setUp(title)
  File "/usr/lib/python2.4/site-packages/debconf.py", line 51, in setUp
    self.version = self.version(2)
  File "/usr/lib/python2.4/site-packages/debconf.py", line 60, in <lambda>
    lambda *args, **kw: self.command(command, *args, **kw))
  File "/usr/lib/python2.4/site-packages/debconf.py", line 81, in command
    status = int(status)
ValueError: invalid literal for int()

/var/log/installer/syslog:
Ubiquity 1.0.17
Sat, 02 Feb 2008 08:05:25 INFO switched to page stepLanguage
ubiquity: Starting up '['/usr/lib/ubiquity/localechooser/localechooser']' for ubiquity.components.language.Language
ubiquity: Watching for question patterns ^languagechooser/language-name
Sat, 02 Feb 2008 08:05:32 INFO Step_before = stepLanguage
Sat, 02 Feb 2008 08:05:34 INFO switched to page stepLocation
Sat, 02 Feb 2008 08:05:34 INFO Step_after = stepLocation
ubiquity: Starting up '['/usr/share/ubiquity/tzsetup']' for ubiquity.components.timezone.Timezone
ubiquity: Watching for question patterns ^time/zone$
Sat, 02 Feb 2008 08:06:06 INFO Step_before = stepLocation
Sat, 02 Feb 2008 08:06:06 INFO switched to page stepKeyboardConf
Sat, 02 Feb 2008 08:06:06 INFO Step_after = stepKeyboardConf
ubiquity: kbd-chooser prepare
ubiquity: Starting up '['/bin/sh', '-c', '. /usr/share/debconf/confmodule; exec /usr/lib/ubiquity/kbd-chooser/kbd-chooser']' for ubiquity.components.kbd_chooser.KbdChooser
ubiquity: Watching for question patterns ^kbd-chooser/method$, ^console-keymaps.*/keymap$, ERROR
ubiquity: apply_keyboard: mac-usb-us
ubiquity: apply_keyboard: layout us, model pc104
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/var/log/syslog:

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"/var/log/syslog" [readonly] 0L, 0C 0,0-1 All

/var/log/partman:

/bin/partman: *******************************************************
/lib/partman/init.d/01unsupported: *******************************************************
/lib/partman/init.d/30parted: *******************************************************
parted_server: ======= Starting the server
parted_server: main_loop: iteration 1
parted_server: Opening infifo
/lib/partman/init.d/30parted: IN: OPEN =dev=hda /dev/hda
parted_server: Read command: OPEN
parted_server: command_open()
parted_server: Request to open =dev=hda
parted_server: Opening outfifo
parted_server: OUT: OK

parted_server: OUT: OK

parted_server: Note =dev=hda as unchanged
parted_server: Closing infifo and outfifo
parted_server: main_loop: iteration 2
parted_server: Opening infifo
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