package grub-pc 1.99-21ubuntu3.1 failed to install/upgrade: ErrorMessage: subprocess installed post-installation script returned error exit status 1

[Caminante]

Fail Grub PC

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: grub-pc 1.99-21ubuntu3.1
ProcVersionSignature: Ubuntu 3.2.0-23.31-lowlatency-pae 3.2.14
Uname: Linux 3.2.0-23-lowlatency-pae i686
ApportVersion: 2.0.1-0ubuntu8
Architecture: i386
CasperVersion: 1.315
Date: Fri Jun 15 13:58:17 2012
ErrorMessage: ErrorMessage: subprocess installed post-installation script returned error exit status 1
LiveMediaBuild: DreamStudio 12.04 LTS "Precise Pangolin" - Release i386
ProcCmdLine: noprompt cdrom-detect/try-usb=true persistent file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash -- maybe-ubiquity
SourcePackage: grub2
Title: package grub-pc 1.99-21ubuntu3.1 failed to install/upgrade: ErrorMessage: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

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