[Dell XPS 8700] ubuntu 14.04 install on usb drive fails on uefi system

[dss1873]

Same problem as bug #1259047, but with latest release of Ubuntu.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubiquity 2.18.7 [modified: lib/partman/automatically_partition/question]
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 May 8 02:47:19 2014
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed boot=casper quiet splash --
LiveMediaBuild: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)