Setting up flashplugin-downloader (11.0.1.152ubuntu1) ...
Downloading...
--2012-03-31 17:22:19--  http://archive.canonical.com/pool/partner/a/adobe-flashplugin/adobe-flashplugin_11.0.1.152.orig.tar.gz
Resolving archive.canonical.com... 91.189.92.191, 91.189.88.33
Connecting to archive.canonical.com|91.189.92.191|:80... connected.
HTTP request sent, awaiting response... 404 Not Found
2012-03-31 17:22:19 ERROR 404: Not Found.

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