natty install failed on btrfs at grub-install

[luk1don]

Binary package hint: ubiquity

unknown

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: ubiquity 2.6.10
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic i686
Architecture: i386
Date: Sat May 14 11:53:04 2011
LiveMediaBuild: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
ProcEnviron:
 LANGUAGE=pl_PL:en
 LANG=pl_PL.UTF-8
 SHELL=/bin/bash
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)
---
Architecture: i386
DistroRelease: Ubuntu 11.04
LiveMediaBuild: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
Package: ubiquity 2.6.10 [modified: lib/partman/automatically_partition/question]
PackageArchitecture: i386
ProcEnviron:
 LANGUAGE=pl_PL:en
 LANG=pl_PL.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Tags: natty
Uname: Linux 2.6.38-8-generic i686
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[luk1don (luk1don)]

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[luk1don (luk1don)]

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[luk1don (luk1don)]

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[luk1don (luk1don)]

apport information

[luk1don (luk1don)]

apport information

[Gary M (garym)]

Extract from UbiquitySyslog :

May 14 09:39:29 ubuntu grub-installer: info: Installing grub on '/dev/sda'
May 14 09:39:30 ubuntu grub-installer: info: grub-install supports --no-floppy
May 14 09:39:30 ubuntu grub-installer: info: Running chroot /target grub-install --no-floppy --force "/dev/sda"
May 14 09:39:38 ubuntu grub-installer: /usr/sbin/grub-setup: warn:
May 14 09:39:38 ubuntu grub-installer:
May 14 09:39:38 ubuntu grub-installer: Your core.img is unusually large. It won't fit in the embedding area.
May 14 09:39:38 ubuntu grub-installer: .
May 14 09:39:38 ubuntu grub-installer: /usr/sbin/grub-setup: warn:
May 14 09:39:38 ubuntu grub-installer:
May 14 09:39:38 ubuntu grub-installer: Embedding is not possible. GRUB can only be installed in this setup by using blocklists. However, blocklists are UNRELIABLE and their use is discouraged..
May 14 09:39:44 ubuntu grub-installer: /usr/sbin/grub-setup: error:
May 14 09:39:44 ubuntu grub-installer:
May 14 09:39:44 ubuntu grub-installer: cannot read `/grub/core.img' correctly
May 14 09:39:44 ubuntu grub-installer: .
May 14 09:39:44 ubuntu grub-installer: error: Running 'grub-install --no-floppy --force "/dev/sda"' failed.