Ubuntu 9.04 firefox flash

Flash stops working on firefox after I upgraded Ubuntu from 8.10 to 9.04.

The following link fixes my problem:
http://bugfixbug.wordpress.com/2009/04/25/ubuntu-flash-does-not-work/

In short:
- remove swfdec-mozilla
- remove gnash-common (including gnash gnash-common mozilla-plugin-gnash)
- install adobe-flashplugin

Restart firefox.