Setting up flashplugin-installer (11.1.102.55ubuntu4) ...
Downloading...
--2012-03-02 22:29:22--  http://archive.canonical.com/pool/partner/a/adobe-flashplugin/adobe-flashplugin_11.1.102.55.orig.tar.gz
Resolving archive.canonical.com (archive.canonical.com)... 91.189.88.33, 91.189.92.191
Connecting to archive.canonical.com (archive.canonical.com)|91.189.88.33|:80... connected.
HTTP request sent, awaiting response... 404 Not Found
2012-03-02 22:29:24 ERROR 404: Not Found.

download failed
The Flash plugin is NOT installed.
dpkg: error processing flashplugin-installer (--configure):
 subprocess installed post-installation script returned error exit status 1