dpkg: syntax error: unknown group `Debian-exim' in statusoverride file

[kevin bailey <kbailey@freewayprojects.com>]

Hi,

I'm getting the following from a vanilla install of sarge.

Any pointers gratefully received - obviously I want to be careful and not
screw up the dpkg system.

Thanks,

Kev

psctbdc2:~# apt-get dist-upgrade
Reading Package Lists... Done
Building Dependency Tree... Done
Calculating Upgrade... Done
The following packages will be upgraded:
  apache apache-common apache2-utils dhcp-client gnupg libapr0 libgd2-noxpm
7 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 2011kB/3671kB of archives.
After unpacking 106kB disk space will be freed.
Do you want to continue? [Y/n]
Get:1 http://security.debian.org stable/updates/main gnupg 1.4.1-1.sarge5
[1909kB]
Get:2 http://security.debian.org stable/updates/main dhcp-client
2.0pl5-19.1sarge2 [102kB]
Fetched 2011kB in 17s (117kB/s)
Preconfiguring packages ...
dpkg: syntax error: unknown group `Debian-exim' in statusoverride file
E: Sub-process /usr/bin/dpkg returned an error code (2)