bootloader "grub" installer not working on Acer Revo

Installing Ubuntu from scratch on Acer Revo Aspire - Linpus was original OS.
It gets to the end but says it can't install the grub installer boot program in the specified location.
I tried the alternate location given but that didn't work either.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: ubiquity 2.10.16
ProcVersionSignature: Ubuntu 3.2.0-23.36-generic-pae 3.2.14
Uname: Linux 3.2.0-23-generic-pae i686
ApportVersion: 2.0.1-0ubuntu5
Architecture: i386
CasperVersion: 1.315
Date: Sun Apr 29 20:33:08 2012
InstallCmdLine: bootkbd=us console-setup/layoutcode=en_US console-setup/variantcode=nodeadkeys locale=us_us persistent noprompt cdrom-detect/try-usb=true file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz splash -- maybe-ubiquity
LiveMediaBuild: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423)
ProcEnviron:
 LANGUAGE=en_GB.UTF-8
 TERM=unknown
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)