I have been running Hardy for a week or so using Kubuntu and Ubuntu with no
problems. I was amazed at its stability compared to when I used it back in
January. I am also very pleased with the improved performance of Firefox 3.

Remember that 8.04 is still in beta, so don't expect it to be perfect. If this
is a common problem (crashing of Firefox 3) then I am sure the developers would
like to have your input.

As for the sound, it again works perfectly with my hardware. I am using the
64-bit version of Hardy. All of the multimedia works great! That is why I am
looking forward to the final release of Hardy so much!

Have you checked the mixer to see if it is turned up?