Sorry if this is obvious I've been wondering why does the optical drive on the 15" and 17" powerbooks/macbook pros look different. The 15" has it more or less in the center (hight wise) whereas the 17" has it higher up. On the PowerBooks I thought this may simply be because the 17" is thinner, but the MBPs are now the same thickness (or rather "thinness")
Pics for 15"
17"
Pics for 15"
17"