package libpam0g 1.1.1-2ubuntu2 failed to install/upgrade:

[John Small]

this is after an upgrade from 9.10 to 10.04

ProblemType: Package
DistroRelease: Ubuntu 10.04
Package: libpam0g 1.1.1-2ubuntu2
ProcVersionSignature: Ubuntu 2.6.32-22.33-generic 2.6.32.11+drm33.2
Uname: Linux 2.6.32-22-generic i686
NonfreeKernelModules: nvidia
Architecture: i386
Date: Sun May 2 15:50:45 2010
ErrorMessage:
 ErrorMessage: subprocess installed post-installation script returned error exit status 1
SourcePackage: pam
Title: package libpam0g 1.1.1-2ubuntu2 failed to install/upgrade: