Today, the system is upgraded, and the experience of ubuntu8.10 is very good. But found a serious problem. Is that Firefox play flash only images, no sound. Found a lot on the Internet. Many of them are system sound support or mixed-tone problems. Follow the online method to get a stool, the problem remains. So I think of the reason.
Firefox playback mp3 can, the system other sound is also normal. So eliminate the system problem, also not too to be Firefox problem. The most questionable is the flashplayer. Because the Flash Player is automatically installed by Firefox. To see the Firefox plugin, the Flash Player version actually wrote something 4, but right click on the player is 9. Firefox cannot open a Flash Web page after going to adobe download 10 installation. Uninstall still cannot be resolved.
From do system, do not Firefox install Flashplayer. Download the installation yourself from Adobe. Solve the problem.