Apple has released iOS version 4.3.3 for the GSM iPhone 4, GSM iPhone 3GS, iPod Touch (3rd & 4th generation), iPad and iPad 2. In addition to bug fixes, the latest iOS version also changes the way the crowd-sourced location cache is handled:
- Reduces the size of the cache
- No longer backs the cache up to iTunes
- Deletes the cache entirely when Location Services is turned off
A separate iOS version 4.2.8 is also available for the CDMA iPhone 4.
Both updates are available through iTunes when you connect your iOS device and click Check for Update.
I have installed the update without issue. Total time to install and sync my iPhone 4 was approximately 13 minutes.