Your syslog is unfortunately cut off at the end. Are you able to reproduce this bug? If so, could I ask that you go through the following steps?
- Boot the latest daily-live CD (http://cdimage.ubuntu.com/daily-live/current) and press "Try Ubuntu" at the first screen.
- Open a terminal and type `ubiquity -d` followed by the enter key. Run through the installer exactly as you did before.
- When it crashes, open a terminal and type `sudo apport-collect 746758`. This will collect /var/log/syslog, /var/log/partman, and /var/log/installer/debug, then attach them to this bug report.
- Finally, open a terminal and type `sudo DEBIAN_FRONTEND=noninteractive chroot /target dpkg --configure -a`. If an error appears, copy and paste it into this bug report, along with /target/var/log/dpkg.log.