package flashplugin-installer (not installed) failed to install/upgrade: conflicting packages - not installing flashplugin-installer

[Alberto Oliart]

Binary package hint: flashplugin-nonfree

I get the following error messages when using the Update Manager
The package 'adobe-flashplugin' is in an inconsistent state and needs to be reinstalled, but no archive can be found for it. Do you want to remove this package now to continue?

And

The package 'adobe-flashplugin' is in an inconsistent state and needs to be reinstalled, but no archive can be found for it. Please reinstall the package manually or remove it from the system.

From Synaptic:

E: The package adobe-flashplugin needs to be reinstalled, but I can't find an archive for it.
E: Internal error opening cache (1). Please report.

ProblemType: Package
Architecture: i386
Date: Fri Oct 23 20:31:51 2009
DistroRelease: Ubuntu 9.10
ErrorMessage: conflicting packages - not installing flashplugin-installer
Package: flashplugin-installer (not installed)
ProcVersionSignature: Ubuntu 2.6.31-14.48-generic
SourcePackage: flashplugin-nonfree
Title: package flashplugin-installer (not installed) failed to install/upgrade: conflicting packages - not installing flashplugin-installer
Uname: Linux 2.6.31-14-generic i686