Orca update broke /etc/pam.d/common-auth making logging in impossible

After todays update of Orca to version 3.1.91-0ubuntu3 my /etc/pam.d/common-auth file was overwritten with the following line:
../../../../../../../share/pyshared/orca/scripts/apps/packagemanager/tutorialgenerator.py

This made logging in to the system impossible.

Workaround:
Boot in recovery mode and run pam-auth-update as root.

I'm marking it as security vulnerability as this update altered conf file with authentication settings used by all services.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: gnome-orca 3.1.91-0ubuntu3
ProcVersionSignature: Ubuntu 3.0.0-11.18-generic 3.0.4
Uname: Linux 3.0.0-11-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 1.23-0ubuntu1
Architecture: amd64
Date: Thu Sep 15 15:31:59 2011
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
PackageArchitecture: all
SourcePackage: gnome-orca
UpgradeStatus: Upgraded to oneiric on 2011-09-12 (2 days ago)