Installer crashed while launching partitioner

Binary package hint: ubiquity

On my laptop I have a running Edgy Eft on a 32 Gb ext 3 partition and a 4 Gb ext 3 with an old and unused edgy eft. I wanter to try Herd 2 on the 4 Gb after a resize.

Launch the Herd2 install, I have arrived for first time at partitioning and have chosen manual. Then resized one partition (32-->28) deleted another of 4 Gb and build a new one of around 8 Gb. Aftrer installer told me that I have one of 28 and one of 4. I do not trust, so stop installation, reboot. The working edgy told me about some problems during the chkdsk, i ignore them and go into X and the sessions started normally. In this session I have runnen GParted, partition are the way I wanted to but the 8Gb has to be formatted, so I did it and everything is ok.
Then I reboot from Herd Cd, run Install and at step 6 out of 7, the one which is running the partitioner, there is a crash and this is the 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

In addition the crash report told me to attach /var/log/syslog and /var/log/partman, which I'll do next.