package samba 2:3.5.8~dfsg-1ubuntu2.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

Binary package hint: samba

Natty upgrade failed. Online reports suggest that the fault is in the Samba4 package. I've uninstalled Samba4 and am attempting to install previous version.

ProblemType: Package
DistroRelease: Ubuntu 11.04
Package: samba 2:3.5.8~dfsg-1ubuntu2.1
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
NonfreeKernelModules: fglrx
Architecture: amd64
Date: Tue May 3 19:22:28 2011
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release amd64 (20100816.1)
SambaClientRegression: Yes
SourcePackage: samba
Title: package samba 2:3.5.8~dfsg-1ubuntu2.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: Upgraded to natty on 2011-05-01 (2 days ago)