Comment 242 for bug 192888

I have now found a solution:

1. Open a terminal
2. Run:

 sudo gedit /etc/apt/sources.list

3. Add the following line and save:

deb http://ppa.launchpad.net/gnomefreak/ubuntu hardy main

4. Run:

sudo apt-get install flashplugin-nonfree libflashsupport

5. Follow the instructions at: http://www.pulseaudio.org/wiki/FlashPlayer9Solution to install a replacement libflashsupport.so

6. Restart Firefox

Flash 10 with PulseAudio on Ubuntu Hardy now works without crashing.