This is from the crash window:
Traceback (most recent call last):
File "/usr/lib/python2.4/site-packages/ubiquity/frontend/kde-ui.py", line 1177, in watch_debconf_fd_helper_read
self.debconf_callbacks[source](source, debconf_condition)
File "/usr/lib/python2.4/site-packages/ubiquity/filteredcommand.py", line 144, in process_input
if not self.process_line():
File "/usr/lib/python2.4/site-packages/ubiquity/filteredcommand.py", line 82, in process_line
return self.dbfilter.process_line()
File "/usr/lib/python2.4/site-packages/ubiquity/debconffilter.py", line 224, in process_line
self.reply(0, 'question will be asked', log=True)
File "/usr/lib/python2.4/site-packages/ubiquity/debconffilter.py", line 129, in reply
self.subin.write('%s\n' % ret)
AttributeError: 'NoneType' object has no attribute 'write'
It has been an *extremely* long time since this was reported, and ubiquity has changed a lot in the many years since. Since it isn't clear what caused this or how to reproduce it, I'm closing this report now as it is no longer useful.