I really hate to say this but it doesn't surprise me in the least. I've owned two macs now, a 13" MB and my current 17" MBP, and they've both experienced serious issues which are clearly design faults that Apple doesn't want to acknowledge and resolve.
The MB suffered the cracked palm rest o' doom which, on the second replacement in less than a year, the Genius said was a design flaw where there was nothing supporting the palm rest where the top case met the bottom and the 'rubbing strips' were simply breaking the case. He admitted it wasn't going to be resolved and it was a good job the machine had Applecare.
The MBP... jesus this has been the WORST computer I've ever owned by a mile. It's been back to the Genius bar on about six occasions now, most importantly for a swollen battery which Apple REFUSED to admit was a manufacturing defect until I started reading the riot act (in the UK they don't have a legal leg to stand on with that issue). The replacement battery has lasted six months and now shorts out occasionaly going from 90% charge and 94% health to 0% charge and, once the mains cable's back in, 12% health in an instant. Oh, and 'Genius' involved in the case reckoned it was something in OS X causing it and I should reinstall my OS...
I do think Apple have got their laptop line if not fixed then at least to a far better level of quality than the machines I've used (2006 MB and 2007 MBP) but there's still far too many issues sneaking through in their computer line that really should be caught and recalled (27" iMac anyone?). Such a shame, I love the OS, I love the design but I'm struggling to justify another one.