Fixed Flash not working in Ubuntu Jaunty 9.04
Recently I did a full re-install of one of my Ubuntu Intrepid 8.10 boxes to the new Ubuntu Junty 9.04. After installation, adobe flash was no longer working within mozilla for some sites. After searching the internet for a solution, I was finally able to get flash working by following these instructions:
$ sudo apt-get remove --purge swfdec-mozilla mozilla-plugin-gnash flashplugin-nonfree adobe-flashplugin $ sudo apt-get install adobe-flashplugin
Note: you'll need to have the Canonical "partner" repository to get access to the adobe-flashplugin package.
From Ubuntu Forums