Paging all PS3 owners. Sony has a new firmware update out which requires an install before you jump back online to game. The PS3 System Software Update 4.66 is an all-new and mandatory firmware update that comes in at just around 200MB. As it is with minor updates, Sony claims the ever-elusive:

 System software stability during use of some features has been improved. 

To check the version of your system software, go to  (Settings) >  (System Settings) > [System Information].

Discuss:

Have you noticed any differences after the PS3 System Software Update 4.66?

[Via PlayStation Support]