package samba4 4.0.0~alpha17.dfsg2-1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[George]

running "sudo apt-get install samba4" gave:

Setting up samba-common-bin (2:3.6.3-2ubuntu1) ...
update-alternatives: using /usr/bin/nmblookup.samba3 to provide /usr/bin/nmblookup (nmblookup) in auto mode.
update-alternatives: using /usr/bin/net.samba3 to provide /usr/bin/net (net) in auto mode.
update-alternatives: using /usr/bin/testparm.samba3 to provide /usr/bin/testparm (testparm) in auto mode.
Setting up samba-dsdb-modules (4.0.0~alpha17.dfsg2-1) ...
Setting up samba4-common-bin (4.0.0~alpha17.dfsg2-1) ...
Setting up samba4 (4.0.0~alpha17.dfsg2-1) ...
Administrator password will be set randomly!
Unknown parameter encountered: "max log size"
Ignoring unknown parameter "max log size"
Unknown parameter encountered: "syslog"
Ignoring unknown parameter "syslog"
Unknown parameter encountered: "unix password sync"
Ignoring unknown parameter "unix password sync"
Unknown parameter encountered: "passwd program"
Ignoring unknown parameter "passwd program"
Unknown parameter encountered: "pam password change"
Ignoring unknown parameter "pam password change"
Unknown parameter encountered: "map to guest"
Ignoring unknown parameter "map to guest"
Unknown parameter encountered: "usershare allow guests"
Ignoring unknown parameter "usershare allow guests"
Unknown parameter encountered: "guest ok"
Ignoring unknown parameter "guest ok"
Unknown parameter encountered: "guest ok"
Ignoring unknown parameter "guest ok"
Unknown parameter encountered: "max log size"
Ignoring unknown parameter "max log size"
Unknown parameter encountered: "syslog"
Ignoring unknown parameter "syslog"
Unknown parameter encountered: "unix password sync"
Ignoring unknown parameter "unix password sync"
Unknown parameter encountered: "passwd program"
Ignoring unknown parameter "passwd program"
Unknown parameter encountered: "pam password change"
Ignoring unknown parameter "pam password change"
Unknown parameter encountered: "map to guest"
Ignoring unknown parameter "map to guest"
Unknown parameter encountered: "usershare allow guests"
Ignoring unknown parameter "usershare allow guests"
Unknown parameter encountered: "guest ok"
Ignoring unknown parameter "guest ok"
Unknown parameter encountered: "guest ok"
Ignoring unknown parameter "guest ok"
ProvisioningError: guess_names: 'realm =' was not specified in supplied /etc/samba/smb.conf. Please remove the smb.conf file and let provision generate it
dpkg: error processing samba4 (--configure):
 subprocess installed post-installation script returned error exit status 1
No apport report written because MaxReports is reached already
                                                              Processing triggers for libc-bin ...
ldconfig deferred processing now taking place
Errors were encountered while processing:
 samba4
E: Sub-process /usr/bin/dpkg returned an error code (1)

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: samba4 4.0.0~alpha17.dfsg2-1
ProcVersionSignature: Ubuntu 3.2.0-21.34-generic 3.2.13
Uname: Linux 3.2.0-21-generic x86_64
ApportVersion: 2.0-0ubuntu2
AptOrdering:
 nfs-kernel-server: Install
 samba4: Configure
 nfs-kernel-server: Configure
Architecture: amd64
Date: Tue Apr 10 19:20:03 2012
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationMedia: Lubuntu 12.04 "Precise Pangolin" - Beta amd64 (20120328)
SourcePackage: samba4
Title: package samba4 4.0.0~alpha17.dfsg2-1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)

[George (gnwiii)]

This system is a fresh install of Lubuntu 12.04 (beta 20120328). System has been working nicely as a "client".