Apple has released iPhone OS to version 3.1.3 (7E18), replacing the OS on all models of iPhone and iPod touch devices.
We have the following fixes:
- Fix for iPhone 3GS battery level reporting
- Fix for app crashes on launch
- Fix for app crashes while using Japanese Kana Keyboard
There's also a bunch of security fixes:
- Playing a maliciously crafted mp4 audio file may lead to an unexpected application termination or arbitrary code execution
- Viewing a maliciously crafted TIFF image may lead to an unexpected application termination or arbitrary code execution
- A person with physical access to a locked device may be able to access the user's data
- Accessing a maliciously crafted FTP server could result in an unexpected application termination, information disclosure, or arbitrary code execution
- Mail may load remote audio and video content when remote image loading is disabled
I've installed it on my iPod touch and everything seems to work fine.