Firmware v3.56 causing problems for Slims.
Gamers are reporting that Sony’s recent PlayStation 3 firmware “security patch” prevents users from upgrading the console’s hard disk drive.
PS3 firmware update v3.56 released last week was described as a “security patch” by Sony bigshot Eric Lempel.
Some speculated that it was an attempt by Sony to prevent George “Geohot” Hotz’s infamous jailbreak from working.