Comment 21 for bug 196470

Colin, please run these steps again:

>So for you there is an advice - reinstall pulseaudio and libflashplugin support for ex this way : apt-get install --reinstall >pulseaudio libflashsupport
>Second thing is to change everything to pulseaudio in "system->preferences->audio settings".

I'm just after those operations and now audio works fine even in flash r48 under Opera and on r115 under Firefox 3.

Please attach the output of of apt-cache flashplugin-nonfree, apt-cache libflashsupport.
You might also need to install clean Ubuntu as stated in comment
>Yep. I hadexactly the same problem. It is fixed, but only when you install fixes on new, empty os

This is not a bug Ubuntu can fix in flash however flash should have libflashsupport as depends (can someone please confirm that it does in latest version of flash?)

Flash source is not free so we are unable to change it to help with this issue so please file bug with upstream flash on this issue and please give us bug URL here. If you would like to see this changed in Flash.