Here are the requested logs. The partition setup sees the EFI system partition as well. Should it really do that, since the Boot Camp beta serves the host OS a legacy BIOS booting option.
-- Installer crashes on Intel iMac https://launchpad.net/bugs/53459 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs