package dpkg-repack 1.33ubuntu2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[amenofelis]

the system always freezes when shuting down as well as always pops up information that some packages fail to install or update.

ProblemType: Package
DistroRelease: Ubuntu 11.04
Package: dpkg-repack 1.33ubuntu2
ProcVersionSignature: Ubuntu 2.6.38-10.46-generic-pae 2.6.38.7
Uname: Linux 2.6.38-10-generic-pae i686
NonfreeKernelModules: fglrx
AptOrdering:
 bookmarkbridge: Install
 bookmarkbridge: Configure
Architecture: i386
Date: Fri Aug 5 18:24:17 2011
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
PackageArchitecture: all
SourcePackage: dpkg-repack
Title: package dpkg-repack 1.33ubuntu2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)