package samba 2:3.6.3-2ubuntu2.11 failed to install/upgrade: subprocess installed post-installation script returned error exit status 128

[majb]

this is after re-installing mythbuntu v12 (v14 is a severe regression and does not really work), the first run of the update manager fails.
maybe the number of packages to update is too big (something in excess of 400 packages)?
anyway, it fails on samba or some sub-component of samba -- hard to say, as the dialogue box goes blank and the update manager hangs.

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: samba 2:3.6.3-2ubuntu2.11
ProcVersionSignature: Ubuntu 3.5.0-23.35~precise1-generic 3.5.7.2
Uname: Linux 3.5.0-23-generic x86_64
ApportVersion: 2.0.1-0ubuntu17.8
Architecture: amd64
Date: Sun Jan 25 21:34:18 2015
DuplicateSignature: package:samba:2:3.6.3-2ubuntu2.11:subprocess installed post-installation script returned error exit status 128
ErrorMessage: subprocess installed post-installation script returned error exit status 128
InstallationMedia: Mythbuntu 12.04.2 "Precise Pangolin" - Release amd64 (20130213)
MarkForUpload: True
NmbdLog:

OtherFailedConnect: Yes
SambaServerRegression: Yes
SmbConfIncluded: Yes
SourcePackage: samba
Title: package samba 2:3.6.3-2ubuntu2.11 failed to install/upgrade: subprocess installed post-installation script returned error exit status 128
UpgradeStatus: No upgrade log present (probably fresh install)