package samba4 4.0.0~alpha15~git20110124.dfsg1-2ubuntu1 failed to install/upgrade: ErrorMessage: subprocess installed post-installation script returned error exit status 1

[garyr]

Binary package hint: samba4

samba4 update failed during upgrade to 11.04

apt-cache policy samba4
samba4:
  Installed: 4.0.0~alpha15~git20110124.dfsg1-2ubuntu1
  Candidate: 4.0.0~alpha15~git20110124.dfsg1-2ubuntu1
  Version table:
 *** 4.0.0~alpha15~git20110124.dfsg1-2ubuntu1 0
        500 http://us.archive.ubuntu.com/ubuntu/ natty/universe amd64 Packages
        100 /var/lib/dpkg/status

ProblemType: Package
DistroRelease: Ubuntu 11.04
Package: samba4 4.0.0~alpha15~git20110124.dfsg1-2ubuntu1
ProcVersionSignature: Ubuntu 2.6.35-28.50-generic 2.6.35.11
Uname: Linux 2.6.35-28-generic x86_64
NonfreeKernelModules: fglrx
Architecture: amd64
Date: Sat Apr 30 08:43:59 2011
ErrorMessage: ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
SourcePackage: samba4
Title: package samba4 4.0.0~alpha15~git20110124.dfsg1-2ubuntu1 failed to install/upgrade: ErrorMessage: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: Upgraded to natty on 2011-04-28 (1 days ago)