The iPhone Dev-Team has introduced PwnageTool 3.1.5 for Mac OS X which now supports Apple’s recently-released iPhone OS 3.1.3.“Phone 3GS users (regardless of unlock) should stay away from this and all 3.1.3 jailbreak tools unless you know you have your “SHSH hashes” backed up via Cydia. That’s because if you make a mistake you may find yourself stuck at official 3.1.3 with no way to jailbreak or come back down to 3.1.2 to jailbreak,” the developers warn.“If you really truly feel that you need to update, [PwnageTool 3.1.5] creates a custom 3.1.3 IPSW for you to restore to on your iPhone 2G, iPhone 3G, iPhone 3GS with early bootrom, iPod touch 1G, and iPod touch 2G with early bootrom,” the iPhone Dev Team says in its recent blog post. “If you don’t know if you have an early