package dropbear 2011.54-1ubuntu0.12.04.2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[emilio defranco]

after an distro upgrade the package don't want update it

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: dropbear 2011.54-1ubuntu0.12.04.2
ProcVersionSignature: Ubuntu 3.2.0-24.39-generic 3.2.16
Uname: Linux 3.2.0-24-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 2.0.1-0ubuntu11
AptOrdering:
 libxenstore3.0: Install
 dropbear: Configure
 libxenstore3.0: Configure
Architecture: amd64
Date: Sat Jul 21 23:00:29 2012
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationMedia: Xubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120328)
SourcePackage: dropbear
Title: package dropbear 2011.54-1ubuntu0.12.04.2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)