Fun story. About seven months ago, one of the feet on my PB fell off. I don't know where it went, where it is now, and where it intends to be, but it's safe for me to assume that that foot is lost forever. In my attempts to fix it, I have discovered that Apple cannot replace a two cent piece of plastic that rests under the actual rubber part of the foot. You can somewhat see it: it's the ring of white encircling the nubbin of grey. I do, however, have the nubbin part - Apple was more than happy to send that out to me. Herein lies the problem: I can try to glue the nubbin to the chasis, but that would result in a still-wobbly computer. Instead, I hope to reconstruct out of everyday parts the type of base I need for this foot. My question is: what do you think would best fit? If you've encountered this problem before, how did you fix it?