In a nutshell, PS3 Firmware 4.41 is a minor PlayStation 3 update that will improve system stability. I just got prompted to do a system update. Looks like no online until some PS3 CFW news appears, however, the encryption keys and the passphrase is still the same.
Below is what the Tweet states, to quote: "PS3 software update v4.41 is coming today, it's a minor update that will improve system stability."
As always, more details and an official changelog will be posted once they become available.
Below are some changes from eussNL as well:
Kiosk/Shop/SEX was also changed – same deal as retail of course. Still downgradeable...