MYTHBUNTU crashed upon clean install on 2nd disk

[Andrew]

I used gparted to format the two HDDs and then used unetbootin on a usb to install mythbuntu on the 2nd disk, sdb1. Installer crashed. I tried again, choosing to reinstall the OS and installer crashed again.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubiquity 2.18.7
ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
Uname: Linux 3.13.0-24-generic x86_64
ApportVersion: 2.14.1-0ubuntu3
Architecture: amd64
CasperVersion: 1.340
Date: Thu Aug 7 10:21:57 2014
InstallCmdLine: initrd=/casper/initrd.lz file=/cdrom/preseed/mythbuntu.seed boot=casper only-ubiquity quiet splash -- BOOT_IMAGE=/casper/vmlinuz.efi
LiveMediaBuild: Mythbuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
ProcEnviron:
 LANGUAGE=en_GB.UTF-8
 TERM=linux
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_GB.UTF-8
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)