package cron 3.0pl1-120ubuntu3 failed to install/upgrade: subprocess installed post-installation script returned error exit status 100

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ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: cron 3.0pl1-120ubuntu3
ProcVersionSignature: Ubuntu 3.2.0-32.51-generic 3.2.30
Uname: Linux 3.2.0-32-generic i686
ApportVersion: 2.0.1-0ubuntu12
Architecture: i386
Date: Wed Nov 14 19:24:25 2012
DuplicateSignature:
 Setting up cron (3.0pl1-120ubuntu3) ...
 invoke-rc.d: unknown initscript, /etc/init.d/cron not found.
 dpkg: error processing cron (--configure):
  subprocess installed post-installation script returned error exit status 100
ErrorMessage: subprocess installed post-installation script returned error exit status 100
InstallationMedia: Xubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423)
SourcePackage: cron
Title: package cron 3.0pl1-120ubuntu3 failed to install/upgrade: subprocess installed post-installation script returned error exit status 100
UpgradeStatus: Upgraded to precise on 2012-10-10 (38 days ago)