
Before you start scrambling for your phone, laptop and data cable, just relax for a second. The latest update to the iPhone software, version 3.1.3, is a minor one. A quick glance at the changelog shows that the update will improve accuracy on the reported battery level on the 3GS, which is a huge help because we’ve sometimes seen it go from 20% to dead in just seconds. The launching of third-party apps should no longer lead to any weird crashes and the Japanese Kana keyboard is fixed. Happy downloading!

Jailbreak safe?
Until we find out for sure, I would say no. Probably not right now.
I thought you would be saying “No if this is ever ‘permitted’ “.
Early reports are saying no.
I think it will be the same problem like with the 3.1.2. Maybe we got the jailbreak in 3 or 4 weeks or even 2 months. I stay on 3.1.2. Maybe Jailbreak won’t be that easy as with the 3.1.2. cheers
I can’t believe people are actually asking if this update is “jailbreak safe”.
Every time you run an update it reinstalls the OS. Whatever changes Jailbreak made, will be wiped out.