It would be nice if it wasn't taking up all the processor time and basically locks opera. And makes the rest of the machine sloooooooooow.
x303

That sucks.
My guess would be it's flash related, either something wrong with flash or the flash player is just to CPU hungry. The flash based audio player is the freely available
http://flash-mp3-player.net/On my system it goes from about 4% to 8%. But it's an AMD x2 running 2.5ghz.
I know flash is not always efficient, but seems strange it would take up all the CPU time just to decode audio.