E: Internal Error, Could not perform immediate configuration (2) on libpam0g

["Niall Mansfield" <nmm@uit.co.uk>]

About a month ago I upgraded a server from Potato to Woody - all OK.

Recently, on the same server, I added 'unstable' entries
to /etc/apt/souces.list, which now reads:

  deb http://ftp.uk.debian.org/debian/ woody main contrib non-free
  deb http://ftp.uk.debian.org/debian-non-US/ woody/non-US main contrib non-free
  deb http://ftp.uk.debian.org/debian/ unstable main contrib non-free
  deb http://ftp.uk.debian.org/debian-non-US/ unstable/non-US main contrib 
non-free

When I ran 'dselect' many packages installed OK, but
now I'm stuck -- every time I run dselect now I get

  E: Internal Error, Could not perform immediate configuration (2) on libpam0g

	Thanks,
	Niall