Sony has quietly released PS3 firmware 3.56, a minor update that adds a "security patch." Vagueness aside, there's little doubt this comes in response to the recent wave of PS3 hacking efforts which have resulted in several custom firmware variants.
Suffice to say, those who value homebrew access are advised not to update at this time[...]
Continue reading: PS3 Firmware 3.56 Is A Security Update...