I just got a new POWERBOOK G4 and when I go to a music site using SAFARI or FIREFOX the player in the HP doesn't work?? It works fine with my iMac G5?? I repaired permissions and everything, still doesnt work.
It's a bug I think, I hope it gets fixed in 10.4.4 because I've heard about it a lot around here.
If you don't own a copy of Garage Band (or you are too lazy to open it), you can also open "Audio MIDI Setup" (in the "Utilities" folder) and set the Audio Output Format back to 44100.0 Hz.