iOS 4.3.3 is now available for the iPhone 4 and 3GS, the iPad and iPad 2, and the third and fourth generation iPod touch. The update can be downloaded and installed via iTunes.
Changes include reducing the size of the location database cache, deleting the cache when Location Services is turned off, and excluding the cache from synchronisation with iTunes on a Mac or PC.
Apple's notes on the update do not specify how long data is kept in the cache, although company officials previously stated they thought seven days would be sufficient.
iOS 4.2.8 delivers equivalent changes to the CDMA version of the iPhone 4 currently sold only through Verizon in the US.
Similar information is reportedly stored by iOS 3, which runs on older iPhones. There is no indication that Apple will be updating that software.