package syslog-ng-core 3.3.4.dfsg-2ubuntu1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Gustavo L]

(I'm a Linux newbie)

Here are the steps that built the crash scenario:

1 - I installed syslog-ng
2 - I replaced entire syslog-ng.conf content with settings to fit Cacti (according to item 5 here: http://forums.cacti.net/viewtopic.php?p=236540&sid=bbc3be4f14ddf6f484d30f613bc8fc46#p236540)
3 - When restarting syslog-ng, it produced errors saying that the conf file had deprecated instructions
4 - I decided to restore the original .conf file by removing and installing syslog-conf
5 - I noticed that the new installation didn't updated /etc/syslog-ng contents (directory where syslog-ng file is)
6 - I manually removed /etc/syslog-ng directory
7 - I removed and reinstalled once more syslog-ng

It was this last installation that produced the error

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: syslog-ng-core 3.3.4.dfsg-2ubuntu1
ProcVersionSignature: Ubuntu 3.5.0-41.64~precise1-generic 3.5.7.21
Uname: Linux 3.5.0-41-generic i686
ApportVersion: 2.0.1-0ubuntu17.5
Architecture: i386
Date: Mon Oct 21 09:34:05 2013
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationMedia: Ubuntu 12.04.2 LTS "Precise Pangolin" - Release i386 (20130213)
MarkForUpload: True
SourcePackage: syslog-ng
Title: package syslog-ng-core 3.3.4.dfsg-2ubuntu1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)