: As we've seen in my colleague and , iOS 4.3 significantly boosts the speed of Safari's JavaScript performance, thanks to the incorporation of the Nitro engine used in the Mac OS X version of Apple's Web browser. In the SunSpider test, both the iPhone 4 and the original iPad showed marked improvements, performing more than twice as quickly as the same devices under iOS 4.2.1.

: Parents of children with iOS devices now have more fine-grained controls over what their kids can and can't do, especially in regards to location. While Location Services could previously be disabled for the entire device or for specific applications (a feature which is still present, but has now been moved to the top level of Settings), you can now also adjust and lock those under Settings -> General -> Restrictions -> Location. It's ideal for when you don't necessarily want your child broadcasting their location on Google Latitude, but do want to be able to find the location of the phone with Find My iPhone in case they misplace it.

In addition, parents can now choose to disable iTunes's --an added boon for those who just really don't like Ping. Apple has also clarified the controls for the Accounts restriction, which now lets parents decide if they want to allow their kids to change account information or not. And Apple has also changed its App Store settings so that , even if other content has been bought within the past 15 minutes. It's a change which should assuage many parents who due to their kids buying items through games and other apps.

: Slideshow transition options used to appear under Settings -> Photos, but they've now been moved to Photos and Camera: when you tap Play, a screen slides up letting you pick a transition and music from your iPod library.