I think you should file a new bug and attach full installation logs
(/var/log/syslog and /var/log/partman; use "save debug logs" from the
main menu to extract them, or they're saved in /var/log/installer/syslog
and /var/log/installer/partman on the installed system). Your problem
may not have the same cause as this bug and it would be better to start
out without assuming that it does.
I think you should file a new bug and attach full installation logs installer/ syslog installer/ partman on the installed system). Your problem
(/var/log/syslog and /var/log/partman; use "save debug logs" from the
main menu to extract them, or they're saved in /var/log/
and /var/log/
may not have the same cause as this bug and it would be better to start
out without assuming that it does.