package flashplugin-installer 11.1.102.55ubuntu4 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[EdwardQi]

I was using Ubuntu Software Center to install Adobe Flash Plugin in the package which version is ubuntu-restricted-extras 57. At the very beginning, all things went well except that Bug #926208(https://bugs.launchpad.net/ubuntu/+source/bamf/+bug/926208) occurred. I didn't what's going wrong and the worst is that I am a freshman using Linux. So I can only provide a few information as follows.

Description: Ubuntu precise (development branch)
Release: 12.04
Version of pkg: ubuntu-restricted-extras 57

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: flashplugin-installer 11.1.102.55ubuntu4
ProcVersionSignature: Ubuntu 3.2.0-16.25-generic 3.2.6
Uname: Linux 3.2.0-16-generic x86_64
ApportVersion: 1.91-0ubuntu1
Architecture: amd64
Date: Sat Mar 3 11:57:08 2012
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
SourcePackage: flashplugin-nonfree
Title: package flashplugin-installer 11.1.102.55ubuntu4 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: Upgraded to precise on 2012-03-03 (0 days ago)

[EdwardQi (edwardqi1991)]

I just did the same operation again and still found 404 error to flash plugin. I only wish it's due to my poor network rather than pkg missing.