A firmware update for Playstation 3 is now available. The update is only mandatory for Japanese PS3, but you can update your PS3 if you live in Europa and US too. I haven’t found out what it do, probably nothing.
Quote from Playstation.blog:
Hi, everyone, I wanted to give you a heads up about PS3 firmware update (v2.43). Unlike previous updates, firmware v2.43 is specific to the Japan region, and only PS3 users there will be required to
install the update. PS3 users in all other regions will not be prompted to download v2.43. However, if you manually initiate a firmware update by clicking on “System Update” under the XMB’s Settings icon, the v2.43 update will be available, regardless of where you are located.