Crash when selecting manual partition Kubuntu Flight 7 live CD

Started Kubuntu Fight 7 live CD. Everything went nominally up to when I clicked on partition manually. As soon as I clicked, the "Installer crashed" dialogue came up. I've installed off of this same CD on the same computer before successfully. The only difference this time was manual instead of automatic partitioning.

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