The bike fitting was once a mysterious process. You'd get your limbs measured, saddle up, and ride off. But there are so many variables in a bike's fit, and some have nothing to with the length of your limbs.
This weekend, I learned the hard way that trying to jailbreak an iPhone 3G using a MacBook running 10.5.6 can totally freeze up the machine later on. Here are the specifics: UPDATED
A warning for all you iPhone jailbreak enthusiasts: Apple's newest OS software update contains quite a stink bomb-10.5.6 disables the Pwnage tool, making you unable to jailbreak or unlock your iPhone or iPod Touch.