libnss-ldap and libnss-ldap:i386 can not be purged together

libnss-ldap and libnss-ldap:i386 can not be purged together, one of
them will explode, because they both ship the /etc/init.d/libnss-ldap
file.

| root@ornery:~# apt-get --purge remove libnss-ldap:i386 libnss-ldap
| Reading package lists... Done
| Building dependency tree
| Reading state information... Done
| The following packages will be REMOVED
| ldap-auth-client* ldap-auth-config* libnss-ldap* libnss-ldap:i386* libpam-ldap* libpam-ldap:i386*
| 0 upgraded, 0 newly installed, 6 to remove and 1 not upgraded.
| After this operation, 863 kB disk space will be freed.
| Do you want to continue [Y/n]? y
| (Reading database ... 220157 files and directories currently installed.)
| Removing libpam-ldap:i386 ...
| Removing libnss-ldap:i386 ...
| * Running nssldap-update-ignoreusers...
| ...done.
| Purging configuration files for libnss-ldap:i386 ...
| update-rc.d: /etc/init.d/libnss-ldap exists during rc.d purge (use -f to force)
| dpkg: error processing libnss-ldap:i386 (--purge):
| subprocess installed post-removal script returned error exit status 1
| Removing libpam-ldap ...
| Removing libnss-ldap ...
| * Running nssldap-update-ignoreusers...
| ...done.
| Purging configuration files for libnss-ldap ...
| dpkg: warning: while removing libnss-ldap, directory '/var/lib/libnss-ldap' not empty so not removed.
| Removing ldap-auth-config ...
| Purging configuration files for ldap-auth-config ...
| Removing ldap-auth-client ...
| Processing triggers for man-db ...
| Processing triggers for ureadahead ...
| Errors were encountered while processing:
| libnss-ldap:i386
| E: Sub-process /usr/bin/dpkg returned an error code (1)
| root@ornery:~#