package fontconfig 2.10.2-0ubuntu2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

bug recognized during the uprade to 13.04 from 12.10

ProblemType: Package
DistroRelease: Ubuntu 13.04
Package: fontconfig 2.10.2-0ubuntu2
ProcVersionSignature: Ubuntu 3.8.0-19.29-generic 3.8.8
Uname: Linux 3.8.0-19-generic x86_64
ApportVersion: 2.9.2-0ubuntu8
Architecture: amd64
Date: Mon Apr 29 12:16:54 2013
DuplicateSignature:
 Setting up fontconfig (2.10.2-0ubuntu2) ...
 Regenerating fonts cache... failed.
 See /var/log/fontconfig.log for more information.
 dpkg: error processing fontconfig (--configure):
  subprocess installed post-installation script returned error exit status 1
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2012-12-13 (136 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
MarkForUpload: True
SourcePackage: fontconfig
Title: package fontconfig 2.10.2-0ubuntu2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: Upgraded to raring on 2013-04-29 (0 days ago)