package postgresql-8.4 8.4.9-0ubuntu0.11.04 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

This bug occurred after I started ubuntu for the first time after postgresql was installed.

ProblemType: Package
DistroRelease: Ubuntu 11.04
Package: postgresql-8.4 8.4.9-0ubuntu0.11.04
ProcVersionSignature: Ubuntu 2.6.38-13.53-generic-pae 2.6.38.8
Uname: Linux 2.6.38-13-generic-pae i686
NonfreeKernelModules: wl
Architecture: i386
Date: Thu Jan 5 15:11:04 2012
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
SourcePackage: postgresql-8.4
Title: package postgresql-8.4 8.4.9-0ubuntu0.11.04 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)