Apple has released iPhone OS 3.1.3, its latest update to the operating system software for the iPhone and iPod touch. According to Apple’s release notes, the update improves the accuracy of reported battery level on the iPhone 3GS, resolves an issue where third-party apps would not launch in some instances, and fixes a bug that may cause an app to crash when using the Japanese Kana keyboard. In addition, a number of security changes have been…
