I've got a computer running 10.04.3. Until sometime last week, Flash sound played fine in Firefox: Youtube, Flash games, everything. Then something happened; I don't know what. Now anything seemingly related to Flash media stopped putting out sound.

I've checked for a newer version of Flash to install, tried the Flash-Aid browser plugin to see what that recommended, even tried downloading Chromium to see if the problem persists in another browser -- it does.

What can I try next to get sound back?