PS3 firmware 2.52 fixes text entry, some playback issues | Engadget
PS3 System Software Ver. 4.89 | XTREME PS
PlayStation 3, PlayStation Vita New Firmware Updates Disable Account Creation, Remove Account Management Settings
PS3 Received a New Firmware Update, By the Way - Push Square
PlayStation 3 updated to official firmware version 4.87 | GBAtemp.net - The Independent Video Game Community
Sony Releases PS3, PS Vita Firmware Updates | PCMag
PS3 Firmware Update 4.87 Is Out, Here Are The Details
PS3 and Vita have updated their firmware for the first time in a while. Preventing PSN account creation and management | GetNavi web GetNavi - News Directory 3
How to fix your bricked PS3 after firmware 4.46 | Attack of the Fanboy