Consider this a PSA from one person with a jailbroken iPhone to another: Don’t upgrade to the just released iPhone OS 3.1.3.

The iPhone dev team — the guys who make all of this jailbreaking stuff possible — have just confirmed that the PwnageTool and redsn0w jailbreak/unlock tools do not work with iPhone OS 3.1.3. In this endless (and really, mostly futile on Apple’s part) game of cat-and-mouse, it’s almost certain that the ridiculous talented folks in the iPhone hacking community will find their way in in no time flat – but in the mean while, hold off updating. It’s all minor bug fixes anyway.