package kdm (not installed) failed to install/upgrade: subprocess installed post-removal script returned error exit status 1

[deadmoo]

Binary package hint: kdebase-workspace

Description: Ubuntu natty (development branch)
Release: 11.04

  Installed: (none)
  Candidate: 4:4.5.80-0ubuntu3
  Version table:
     4:4.5.80-0ubuntu3 0
        500 http://us.archive.ubuntu.com/ubuntu/ natty/main i386 Packages
     4:4.5.3-0ubuntu3 0
        100 /var/lib/dpkg/status
     4:4.5.1-0ubuntu8 0
        500 http://us.archive.ubuntu.com/ubuntu/ maverick/main i386 Packages

ProblemType: Package
DistroRelease: Ubuntu 11.04
Package: kdm (not installed)
ProcVersionSignature: Ubuntu 2.6.37-6.17-generic 2.6.37-rc3
Uname: Linux 2.6.37-6-generic i686
NonfreeKernelModules: nvidia
Architecture: i386
Date: Tue Nov 30 22:29:16 2010
ErrorMessage: subprocess installed post-removal script returned error exit status 1
SourcePackage: kdebase-workspace
Title: package kdm (not installed) failed to install/upgrade: subprocess installed post-removal script returned error exit status 1