package tzdata 2011g-0ubuntu0.11.04 failed to install/upgrade: subprocess installed post-installation script returned error exit status 128

[Stephen Bathgate]

installed 11.04 on clean notebook computer today, attempting to install the restricted extras gives errors in tzdata

ProblemType: Package
DistroRelease: Ubuntu 11.04
Package: tzdata 2011g-0ubuntu0.11.04
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
NonfreeKernelModules: nvidia wl
Architecture: amd64
Date: Mon Jul 18 21:51:30 2011
ErrorMessage: subprocess installed post-installation script returned error exit status 128
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
PackageArchitecture: all
SourcePackage: tzdata
Title: package tzdata 2011g-0ubuntu0.11.04 failed to install/upgrade: subprocess installed post-installation script returned error exit status 128
UpgradeStatus: No upgrade log present (probably fresh install)