Installer crash when moving to partitioning

Binary package hint: ubiquity

Installer had just finished language selection, etc. I had empty space ready and was going to manually partition, but the installer hung for a very long time and then came back with a crash report. At no time did the normal autopart/manual part menu come up.

System is a Dell 1705 laptop (Core 2 Duo) and was booted to Feisty Herd 2 live CD at the time. No other applications running.

Report:

Traceback (most recent call last):
  File "/usr/lib/ubiquity/bin/ubiquity", line 185, in ?
    main()
  File "/usr/lib/ubiquity/bin/ubiquity", line 180, in main
    install(args[0])
  File "/usr/lib/ubiquity/bin/ubiquity", line 56, in install
    ret = wizard.run()
  File "/usr/lib/ubiquity/ubiquity/frontend/gtkui.py", line 310, in run
    self.process_step()
  File "/usr/lib/ubiquity/ubiquity/frontend/gtkui.py", line 867, in process_step
    self.process_autopartitioning()
  File "/usr/lib/ubiquity/ubiquity/frontend/gtkui.py", line 922, in process_autopartitioning
    choice = self.get_autopartition_choice()[0]
  File "/usr/lib/ubiquity/ubiquity/frontend/gtkui.py", line 1620, in get_autopartition_choice
    raise AssertionError, "no active autopartitioning choice"
AssertionError: no active autopartitioning choice

*NOTE*

The bug report asks that I attach syslog & partman, but I see no way to do so.