Comment 1 for bug 43504

I think I've just suffered the same problem - using Kubuntu Flight 7. The installer crashed when going from step 6>7 (after choosing to manually edit partitions...)

Output from the installer is:
Traceback (most recent call last):
  File "/usr/bin/ubiquity", line 112, in ?
    install(sys.argv[1])
  File "/usr/bin/ubiquity", line 52, in install
    ret = wizard.run()
  File "/usr/lib/python2.4/site-packages/ubiquity/frontend/kde-ui.py", line 305, in run
    self.process_step()
  File "/usr/lib/python2.4/site-packages/ubiquity/frontend/kde-ui.py", line 719, in process_step
    self.process_disk_selection()
  File "/usr/lib/python2.4/site-packages/ubiquity/frontend/kde-ui.py", line 771, in process_disk_selection
    if self.manual_choice is None or unicode(choice, "utf-8") == self.manual_choice:
TypeError: decoding Unicode is not supported

My system is:
* AMD Athlon XP 1700+ ; 1Gb ram
* /dev/hda = ExcelStor J880 - 80Gb
*/dev/hdc = IBM Deskstar 80Gb (I think - code # is IC35L080AVVA07)

current partition setup is:
Using /dev/hda
(parted) print
Disk geometry for /dev/hda: 0kB - 82GB
Disk label type: msdos
Number Start End Size Type File system Flags
1 32kB 11GB 11GB primary ext3 boot
3 21GB 82GB 61GB extended
5 21GB 22GB 1077MB logical linux-swap
6 22GB 52GB 30GB logical ext3
7 52GB 82GB 30GB logical ext3
(parted) select /dev/hdc
Using /dev/hdc
(parted) print
Disk geometry for /dev/hdc: 0kB - 82GB
Disk label type: msdos
Number Start End Size Type File system Flags
1 32kB 82GB 82GB primary ext3
(parted)

Let me know if more info is needed...