package flashplugin-installer 10.2.153.1ubuntu1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Quynh]

Binary package hint: flashplugin-nonfree

Error after install ubuntu-restricted-extras package and flash-nonfree is included

ProblemType: Package
DistroRelease: Ubuntu 11.04
Package: flashplugin-installer 10.2.153.1ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-8.41-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
Architecture: amd64
Date: Wed Apr 6 21:16:22 2011
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Beta amd64 (20110404)
SourcePackage: flashplugin-nonfree
Title: package flashplugin-installer 10.2.153.1ubuntu1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)