Sony have released yet another optional system firmware which “improves software stability”, allowing users an apparently more stable software experience on the PS3. (Who’s betting it’s another fix to PS3 hacking tools which will block them for 4 hours before they’re updated?)

In all seriousness, we would assume this fix simply improves gameplay on some titles which were previously a bit glitchy, laggy and slow on the PS3, making them playable again.

Well, head on to your PS3 and update to 4.21 if you want to, it’s optional.