package texlive-base 2009-10 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

Binary package hint: texlive-base

i don't know how this happened
if it couldn't installed/upgraded this package then why synaptic says it is up to date

ProblemType: Package
DistroRelease: Ubuntu 10.10
Package: texlive-base 2009-10
ProcVersionSignature: Ubuntu 2.6.35-19.26-generic 2.6.35.3
Uname: Linux 2.6.35-19-generic x86_64
NonfreeKernelModules: wl
Architecture: amd64
Date: Fri Aug 27 23:28:41 2010
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
PackageArchitecture: all
SourcePackage: texlive-base
Title: package texlive-base 2009-10 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1