Just acquired this PS3 from a thrift store and it's still on Version 2.76 : r/PS3
How to update ps3 to 4.81 CFW - YouTube
W00fer on Twitter: "Hey @esc0rtd3w @Mathieulh @PSXPlace @roXyPS3 I have found something interesting. Today I received a new blu-ray movie which requires a software update of the PS3. I'm on 4.81 Rebug