I always like to ask before I do something that may have a Steve Jobs critical update to it. I've been running 3.1.2 on iTunes 9.2. Hard drive crashed and it's time to upgrade to iTunes 10. Simple question. Is it going to effect my iPhone sync and/or my jailbreak. Should I create a new sync file in 10 or port the old application 'apple computer' and reinstall 9.2.