package firefox 16.0+build1-0ubuntu0.12.04.1 failed to install/upgrade: package firefox is already installed and configured

[naria chris]

d1-0ubuntu0.12.04.1 failed to install/upgrade: package firefox is already installed and configured

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: firefox 16.0+build1-0ubuntu0.12.04.1
ProcVersionSignature: Ubuntu 3.2.0-31.50-generic 3.2.28
Uname: Linux 3.2.0-31-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 2.0.1-0ubuntu13
Architecture: amd64
Date: Wed Oct 10 12:27:05 2012
ErrorMessage: package firefox is already installed and configured
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
SourcePackage: dpkg
Title: package firefox 16.0+build1-0ubuntu0.12.04.1 failed to install/upgrade: package firefox is already installed and configured
UpgradeStatus: Upgraded to precise on 2012-05-02 (162 days ago)