package dkimproxy 1.2-3 failed to install/upgrade: subprocess installed post-installation script returned error exit status 2

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every time I install anything this error appears, but afterwards it is installed, not sure if properly as I'm not an expert but a newbie in UBUNTU

ProblemType: Package
DistroRelease: Ubuntu 10.04
Package: dkimproxy 1.2-3
ProcVersionSignature: Ubuntu 2.6.32-30.59-generic 2.6.32.29+drm33.13
Uname: Linux 2.6.32-30-generic i686
NonfreeKernelModules: nvidia
AptOrdering:
 rdesktop: Install
 dkimproxy: Configure
 rdesktop: Configure
Architecture: i386
Date: Thu May 26 09:32:05 2011
ErrorMessage: subprocess installed post-installation script returned error exit status 2
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
PackageArchitecture: all
SourcePackage: dkimproxy
Title: package dkimproxy 1.2-3 failed to install/upgrade: subprocess installed post-installation script returned error exit status 2