package keyboard-configuration 1.57ubuntu20 failed to install/upgrade: ErrorMessage: subprocess installed post-installation script returned error exit status 1

Binary package hint: console-setup

upgrading a 16GB-USB-stick with a 4GB persistence file from 10.10 to 11.04.

ProblemType: Package
DistroRelease: Ubuntu 11.04
Package: keyboard-configuration 1.57ubuntu20
ProcVersionSignature: Ubuntu 2.6.35-22.33-generic 2.6.35.4
Uname: Linux 2.6.35-22-generic i686
Architecture: i386
Date: Thu May 19 06:05:58 2011
ErrorMessage: ErrorMessage: subprocess installed post-installation script returned error exit status 1
LiveMediaBuild: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
PackageArchitecture: all
SourcePackage: console-setup
Title: package keyboard-configuration 1.57ubuntu20 failed to install/upgrade: ErrorMessage: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: Upgraded to natty on 2011-05-19 (0 days ago)