Nate True has posted an FAQ for the current iPhone 1.1.3 jailbreak method (Mac, Windows) that answers questions about problems you may be experiencing after attempting the jailbreak, its limitations, and how to recover an ostensibly bricked iPhone.
Among the caveats:The Google Maps "Locate Me" function will not work as well after applying this jailbreak. That's because this method doesn't upgrade the iPhone's cell phone radio, meaning only Wi-Fi data will be used to estimate your current position. iTunes Store previews don't work with this method. A variety of issues can … Read more