Apple's iOS 4.3.1 update has gone live and is available for your iOS-based device right now. But, if you're not experiencing any of the problems listed in the bugfix changelog, it's always good to remember the age old saying "if it ain't broke, don't fix it".
Jailbreakers note: Jailbreakers have not confirmed whether Apple have changed any of the underlying structure or not, what does this mean you ask? Well, a jailbreak for 4.3.1 might be much further away than a jailbreak for 4.3 - but, if you aren't jailbroken, then by all means - go forth and grab it from
the most amazing program in the world, iTunes.