The instructions on Google's installation page for PIL are incorrect.
I had initially upgraded right after Leopard was released, at the end of last year, only to experience a myriad of problems like keyboard freezes (and here). I was so disenchanted that I wrote posts with titles like Leopard is tarnishing the reputation of OS X and Leopard: Great eye candy, pity the keyboard doesn’t always work before giving up and downgrading to Tiger.
That's good news but, to tell you the truth, I'm going to wait a couple of months at least before even considering giving Leopard another shot. See, the thing is, I'm really happy on Tiger and downgrading to it made me realize just how many little issues I had with Leopard (responsiveness, general quirkiness, etc.) I absolutely love how stable Tiger is. I love how Tiger looks (yes, I love my non-transparent menu bar, rounded corners and blue apple logo) and I love how everything (all applications, etc.) work. I love the level of polish Tiger has.
Dear Apple,
I have a Macbook Pro. It's your hardware. Unmodified. As shipped from your factory. I also recently bought your operating system upgrade for OS X Leopard. The only problem is that since I upgraded to Leopard, I can't use my keyboard without it freezing every few minutes.
Yeah, that does suck. In fact, it sucks huge hairy elephant balls.