iPhone/iPod Touch Software 3.1.3 now out
Apple has upgraded the iPhone and iPod Touch software to version 3.1.3 which includes the following changes:
Improved accuracy of reported battery level on the iPhone 3GS
Resolves issue where third-party apps would not launch in some cases
Fixes a bug which may cause an app to crash when using the Japanese Kana keyboard.
The software update is compatible with all versions of the iPhone and iPod Touch and is available now through iTunes.