package flashplugin-installer (not installed) failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[indium]

upgrading from 11.10 to 12.04 on a macbook 6,2, the update manager finished while not even kernel 3.2 was installed. After doing the (suggested) restart, it appeared that many more packages were not installed yet. The update-manager -d didn't work anymore and via apt-get dist-upgrade I had to clean up. Already in 11.10 the update-manager didn't work anymore and I used to work via the aptitude or apt-get update/upgrade.
Many 32bits libraries give problems. There's warnings about this on the net, but for the non-beta release this REALLY needs to be solved!

Am I now completely deprived from flashplugin and icaclient for ever??

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: flashplugin-installer (not installed)
ProcVersionSignature: Ubuntu 3.2.0-22.35-generic 3.2.14
Uname: Linux 3.2.0-22-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.0-0ubuntu4
Architecture: amd64
Date: Fri Apr 6 17:02:58 2012
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
SourcePackage: flashplugin-nonfree
Title: package flashplugin-installer (not installed) failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: Upgraded to precise on 2012-04-06 (0 days ago)