package gconf2 3.2.3-3ubuntu1 failed to install/upgrade: ErrorMessage: subprocess installed post-installation script returned error exit status 127

[kairily]

upgrade from ubuntu 11.10 to ubuntu 12.04 beta

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: gconf2 3.2.3-3ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-18.28-generic 3.2.9
Uname: Linux 3.2.0-18-generic x86_64
ApportVersion: 1.94-0ubuntu2
Architecture: amd64
Date: Fri Mar 9 02:29:39 2012
ErrorMessage: ErrorMessage: subprocess installed post-installation script returned error exit status 127
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
SourcePackage: gconf
Title: package gconf2 3.2.3-3ubuntu1 failed to install/upgrade: ErrorMessage: subprocess installed post-installation script returned error exit status 127
UpgradeStatus: Upgraded to precise on 2012-03-09 (0 days ago)