grub-installer crashing on install 14.04

[mbcrui]

grub-installer failing to install on any kind of install (upgrade, clean install) of 14.04, leaving system in unusable state... which sucks, guys.

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: Wed Jul 2 06:20:20 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)