Sony has released a new firmware update for the Australian PS3 . You can get it via wi-fi on your PS3 and click System Update, that is the easy way or you can download it from http://au.playstation.com/ps3/support/system-software/detail/item420189/Update-features-%28ver-3-73%29/
When searching for what the update offered I find it strange that people ask on Yahoo Answers questions like
PS3 3.73 Firmware free download?? where can i download it?
All they need to do is go to the Sony PS3 site, I am sure they have done it before.
Anyway the update is not mandatory and the only thing it mentions is – Playback quality during use of some PlayStation 3 format software has been improved. The update takes less than 5 minutes so not a long time to do it.
And on some systems the firmware 3.73 also turns your PS3 white, so only proceed if you don’t want your Black PS3 changing colour.