package slapd 2.4.28-1.1ubuntu4 failed to install/upgrade: ErrorMessage: subprocess installed post-installation script returned error exit status 1

[Enzo]

Description: Ubuntu 12.04 LTS
Release: 12.04

apt-cache policy slapd
slapd:
  Installed: 2.4.28-1.1ubuntu4
  Candidate: 2.4.28-1.1ubuntu4
  Version table:
 *** 2.4.28-1.1ubuntu4 0
        500 http://nl.archive.ubuntu.com/ubuntu/ precise/main i386 Packages
        100 /var/lib/dpkg/status

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: slapd 2.4.28-1.1ubuntu4
ProcVersionSignature: Ubuntu 3.2.0-24.39-generic 3.2.16
Uname: Linux 3.2.0-24-generic i686
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu8
Architecture: i386
Date: Sun Jun 10 18:02:57 2012
ErrorMessage: ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
SourcePackage: openldap
Title: package slapd 2.4.28-1.1ubuntu4 failed to install/upgrade: ErrorMessage: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: Upgraded to precise on 2012-06-10 (0 days ago)

[Serge Hallyn (serge-hallyn)]

Setting up slapd (2.4.28-1.1ubuntu4) ...
  Backing up /etc/ldap/slapd.conf in /var/backups/slapd-2.4.25-1.1ubuntu4.1... done.
  Moving old database directories to /var/backups:
  Loading from /var/backups/slapd-2.4.25-1.1ubuntu4.1:
  - directory dc=my-domain,dc=com...
  - directory dc=my-domain,dc=com... failed.
Loading the database from the LDIF dump failed with the following
error while running slapadd:
    slapadd: line 1: cannot add entry with empty dn=""

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.