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

[James Grimaldi]

Binary package hint: samba4

come up when I was upgrading to 11.04
said that it couldn't install samba4

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 i686
Architecture: i386
Date: Fri Apr 29 17:25:13 2011
ErrorMessage: ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
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 2011-04-29 (0 days ago)