After weeks of searching for a solution, this has finally got sound in flash working for me.

https://launchpad.net/distros/ubuntu...ree/+bug/29760


# Flash also looks for /usr/lib/libesd.so.1
sudo ln -s /usr/lib/libesd.so.0 /usr/lib/libesd.so.1

# Flash expects /tmp/.esd/socket to exist.
sudo mkdir -p /tmp/.esd/
sudo touch /tmp/.esd/socket