package postgresql-common 101 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[GregoryHuey]

A popup window displayed the following error message:

E: postgresql-common: subprocess installed post-installation script returned error exit status 1
E: postgresql-8.4: dependency problems - leaving unconfigured
E: postgresql-pltcl-8.4: dependency problems - leaving unconfigured
E: emacspeak: subprocess installed post-installation script returned error exit status 2
E: flim: subprocess installed post-installation script returned error exit status 2

ProblemType: Package
Architecture: amd64
Date: Sun Jun 26 02:09:24 2011
DistroRelease: Ubuntu 9.10
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027.1)
NonfreeKernelModules: nvidia
Package: postgresql-common 101
PackageArchitecture: all
ProcVersionSignature: Ubuntu 2.6.31-23.75-generic
SourcePackage: postgresql-common
Title: package postgresql-common 101 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
Uname: Linux 2.6.31-23-generic x86_64

[Martin Pitt (pitti)]

chown: invalid group: `postgres:postgres'

Seems you locally modified the user database, or perhaps use LDAP/NIS/etc?