likewise-open doesn't undo changes upon aptitude remove

[bp5109]

Upon removing likewise-open from my system, it seems all it's modifications to pam are not removed. I had to comment out the following from a live disc in order to log back in again, as I was getting an error message "module unknown" from the terminal, and "Authentication Failed" from GDM.

:/etc/pam.d$ grep lwident *
common-account:#account required /lib/security/pam_lwidentity.so unknown_ok
common-account:#account sufficient /lib/security/pam_lwidentity.so
common-auth:#auth sufficient /lib/security/pam_lwidentity.so
common-password:#password sufficient /lib/security/pam_lwidentity.so
common-session:#session sufficient /lib/security/pam_lwidentity.so

This was done on Ubuntu 8.04

$ sudo apt-cache policy likewise-open
likewise-open:
  Installed: (none)
  Candidate: 4.0.5-0ubuntu3
  Version table:
     4.0.5-0ubuntu3 0
        500 http://us.archive.ubuntu.com hardy/main Packages
        100 /var/lib/dpkg/status