12.04 installation failed--grub install failed, locked /dev resource

[Anadon]

Installed 12.04 on my laptop over 11.10.

seperate boot, root, and home partitions.

I think this will be an easy fix.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: ubiquity 2.9.5
ProcVersionSignature: Ubuntu 3.2.0-2.6-generic 3.2.0-rc3
Uname: Linux 3.2.0-2-generic x86_64
ApportVersion: 1.90-0ubuntu1
Architecture: amd64
CasperVersion: 1.292
Date: Fri Dec 2 10:20:29 2011
LiveMediaBuild: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20111202)
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Ubuntu Foundations Team Bug Bot (crichton)]

Exception during installation:
Dec 2 15:20:24 ubuntu plugininstall.py: Traceback (most recent call last):
Dec 2 15:20:24 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 1653, in <module>
Dec 2 15:20:24 ubuntu plugininstall.py: install.run()
Dec 2 15:20:24 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 55, in wrapper
Dec 2 15:20:24 ubuntu plugininstall.py: func(self)
Dec 2 15:20:24 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 210, in run
Dec 2 15:20:24 ubuntu plugininstall.py: self.remove_extras()
Dec 2 15:20:24 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 1414, in remove_extras
Dec 2 15:20:24 ubuntu plugininstall.py: if self.db.get('apt-setup/restricted') == 'false':
Dec 2 15:20:24 ubuntu plugininstall.py: File "/usr/lib/python2.7/dist-packages/debconf.py", line 60, in <lambda>
Dec 2 15:20:24 ubuntu plugininstall.py: lambda *args, **kw: self.command(command, *args, **kw))
Dec 2 15:20:24 ubuntu plugininstall.py: File "/usr/lib/python2.7/dist-packages/debconf.py", line 81, in command
Dec 2 15:20:24 ubuntu plugininstall.py: status = int(status)
Dec 2 15:20:24 ubuntu plugininstall.py: ValueError: invalid literal for int() with base 10: ''
Dec 2 15:20:24 ubuntu plugininstall.py:

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.