iPhone 3.1.3: iPhone, iPhone 3G, and iPhone 3GS firmware update

It looks like Apple has released a new iPhone 3.1.3 update for iPhone, iPhone 3G, and iPhone 3GS users. This new update includes the following fixes:
- Improves accuracy of reported battery level on iPhone 3GS
- Resolves third-party application crashes
- Fixes bugs with Japanese keyboard
You can either download the iPhone 3.1.3 update through iTunes, or you can also download it directly from the iPhone userbar.
Related posts:
- iPhone 2.1 software update to be released Friday 12th
- Surprise: Apple releases 2.2 iPhone firmware
- iPhone firmware update 1.1.1 released


Skype for iPad supports video calling and will be released very soon.
Since loading this I have been getting spurious ‘low battery’ level warnings when the battery indicator shows plent of charge remaining. Has anyone else had this ?