Installer crashed. Created separate /boot partition, could not install, fatal error occured

[Pankaj]

I created separate parition /boot, /, /home. While trying to install ubutnu 12.04 LTS, the installer crashed, (even though I can see a message in background, installation finished, continue testing or restart.) Apparently, the bootloader cannot be installed in /boot partition(250MiB). Tried to install on Windows 7 bootloader, Windows 8 Bootloader, /dev/sda, /(root), but nothing worked. The other operations available were continue without installing bootloader, or cancel the installation. I chose to cancel and will try to install this time with deleteing /boot partition.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: ubiquity 2.10.16
ProcVersionSignature: Ubuntu 3.2.0-23.36-generic 3.2.14
Uname: Linux 3.2.0-23-generic x86_64
ApportVersion: 2.0.1-0ubuntu5
Architecture: amd64
CasperVersion: 1.315
Date: Mon Apr 30 23:48:10 2012
InstallCmdLine: noprompt cdrom-detect/try-usb=true file=/cdrom/preseed/ubuntu.seed boot=casper persistent initrd=/casper/initrd.lz splash -- BOOT_IMAGE=/casper/vmlinuz
LiveMediaBuild: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
ProcEnviron:
 TERM=unknown
 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:
Apr 30 23:48:05 ubuntu plugininstall.py: Traceback (most recent call last):
Apr 30 23:48:05 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 1735, in <module>
Apr 30 23:48:05 ubuntu plugininstall.py: install.run()
Apr 30 23:48:05 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 55, in wrapper
Apr 30 23:48:05 ubuntu plugininstall.py: func(self)
Apr 30 23:48:05 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 204, in run
Apr 30 23:48:05 ubuntu plugininstall.py: self.configure_bootloader()
Apr 30 23:48:05 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 1013, in configure_bootloader
Apr 30 23:48:05 ubuntu plugininstall.py: "GrubInstaller failed with code %d" % ret)
Apr 30 23:48:05 ubuntu plugininstall.py: InstallStepError: GrubInstaller failed with code 1
Apr 30 23:48:05 ubuntu plugininstall.py:

[Launchpad Janitor (janitor)]

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