Comment 17 for bug 663319

Peter,

Your apt-cache policy shows you do not have -proposed configured to install by default.

libpam-heimdal:
  Installed: (none)
  Candidate: 3.15-2ubuntu1
  Version table:
     3.15-2ubuntu2 0
        400 http://archive.ubuntu.com/ubuntu/ maverick-proposed/universe amd64 Packages
     3.15-2ubuntu1 0
        900 http://ca.archive.ubuntu.com/ubuntu/ maverick-updates/universe amd64 Packages

The candidate package should be 3.15-2ubuntu2, not 3.15-2ubuntu1. You will either need to adjust your /etc/apt/preferences, or install with 'apt-get install libpam-heimdal=3.15-2ubuntu2' for testing.