obsolete OSS audio interface?

[Alimin Bijosono Oei]

Hi guys,

When running firefox under FC3 and doing 'dmesg', I get this message:
application firefox-bin uses obsolete OSS audio interface

I thought ALSA is the default now? How come firefox is still using OSS? 
In the kde configuration module, under Sound System, I have also 
selected ALSA as the audio device. So what's the problem here and how do 
I fix this?

Regards,
Alimin