PS3: Homebrew ENabler 3.0.3_4.88 released for Firmware 4.88 - Wololo.net
PS3 Firmware Update Disables “Other OS” Option - Game Informer
Sony PS3 firmware v3.21 strips "Other OS" functionality - SlashGear
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
PS3 Gets a Surprise Firmware Update, Available to Download Now - Push Square
Sony Releases New Firmware Update for PS3, Here's What It Does
Latest PS3 update freezes consoles; Update: new patch due Thursday | Metro News
PS3 Firmware Update 4.87 - Patch Notes - GNAG
Surprise! There's a new PS3 firmware update - here's what patch 4.88 does | TheSixthAxis
PS3 Mandatory Firmware Update 4.66 Released [Update]