package initramfs-tools 0.99ubuntu13 failed to install/upgrade: ErrorMessage: subprocess installed post-installation script returned error exit status 1

[Grande Eusebio]

I upgraded yesterday 2 Ubuntu 12.04.1 from 11.10, this is the first time I run my (very old) system on Xububuntu, & then it's also the 1rst time I'm using the update system. Msg error came immediately. Yesterday a first update seemed ok under deskop Ubuntu2D.
Tanx for all
Cesare

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: initramfs-tools 0.99ubuntu13
ProcVersionSignature: Ubuntu 3.2.0-32.51-generic 3.2.30
Uname: Linux 3.2.0-32-generic i686
ApportVersion: 2.0.1-0ubuntu13
Architecture: i386
Date: Thu Oct 4 22:49:20 2012
ErrorMessage: ErrorMessage: subprocess installed post-installation script returned error exit status 1
PackageArchitecture: all
SourcePackage: initramfs-tools
Title: package initramfs-tools 0.99ubuntu13 failed to install/upgrade: ErrorMessage: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: Upgraded to precise on 2012-10-04 (0 days ago)