PS3 Firmware Update 4.87 Is Out, Here Are The Details
Sony issues fix for broken PlayStation 3 firmware - GameSpot
PlayStation 3: Sony releases Firmware 4.86 for their 13 year old console - HFW 4.86 released, SEN Enabler updated & PS3HEN to be updated soon due to no kernel changes! - Wololo.net
How to update playstation 3 system software - YouTube
PS3 firmware 3.21 locking out more than just other operating systems? | Engadget