Apple today released iPhone OS 3.1.3 for iPhone and iPod touch which contians bug fixes and improvements, including the following:

• Improves accuracy of reported battery level on iPhone 3GS
• Resolves issue where third-party apps would not launch in some instances
• Fixes bug that may cause an app to crash when using the Japanese Kana keyboard

Products compatible with this software update:
• iPhone (all models)
• iPod touch (all models)

To update, select your device in iTunes and choose “Update” within the “Summary” tab.

[Thanks to MacDailyNews Reader "JES42" for the heads up.]