Sudo and libpam-mount don't play nice

[Matthew House]

Every time i use the Sudo or install a package I get an error with sudo

sudo: pam_mount.c:417: modify_pm_count: Assertion `user != ((void *)0)' failed.
Aborted
dpkg: error processing playdeb (--configure):
 subprocess installed post-installation script returned error exit status 134

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: sudo 1.8.3p1-1ubuntu3
ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14
Uname: Linux 3.2.0-24-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu7
Architecture: amd64
Date: Sun May 6 17:39:01 2012
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
ProcEnviron:
 LANGUAGE=en_AU:en
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_AU.UTF-8
 SHELL=/bin/bash
SourcePackage: sudo
UpgradeStatus: No upgrade log present (probably fresh install)
VisudoCheck: /etc/sudoers: parsed OK