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 cause you to have to restore your iPhone -- over and over in some cases -- in order to get this jailbreak to take.
- Your iPhone may take a while (up to 4 minutes) to boot after applying the jailbreak.
- The jailbreak currently doesn't work on PowerPC-based Macs.
As noted yesterday, we're still awaiting a more robust, less problem prone jailbreak due from the iPhone Dev team.