The PlayStation 3 just got updated, bringing the machine's firmware to v3.55. Sony say "this is a minor update that adds a security patch". What ever could they mean?
They're surely referring to a recent upsurge in "jailbreaks" for the console. A few months ago, devices went on sale that allowed the copying of PlayStation 3 games. While Sony was quick to block these devices' access to the console, recent improvements made to the jailbreak tools have let them back in the game.
This kind of tit-for-tat running battle between platform holders and hackers/pirates/people who just want to backup their own games is common place on the Wii, and has been for years now. Looks like it's about to be the same on the PS3.