PS3 Firmware Update 4.20 Now Available

This is a mandatory system software update
The latest system software update (v4.20) for PS3 has been released allowing you to set the amount of time that the system will wait before turning itself off automatically for [Video/TV/Music/Photo] and for [Game/Other Features], Sony Computer Entertainment (SCE) announced. Additionally, saved data management has been improved. You will now be able to select multiple saved data items and delete or copy them as a group.
System software update (v4.10) added a feature that enabled you to hear your own voice through the Wireless Stereo Headset when playing multiplayer modes. This type of audio feedback is known as "sidetone". System software update (v4.20) improves sidetone audio performance by giving you the option to select one out of five levels for microphone audio, or turn the feature off completely. For those of you who use the Wireless Stereo Headset to watch Blu-ray or DVD movies on your PS3, this system software update will also enable virtual surround sound functionality, giving you a superior audio experience.