[sokoloff]

Engineers use gaskets between two surfaces all the time in an attempt to prevent fluids from passing. Some of those gaskets will fail. Sometimes the failure is because the mating surfaces have been flexed in use. Sometimes it's because the device has been disassembled and reassembled. Sometimes there was too much pressure differential applied. Sometimes they're just defective. Yet, they are still serving the intended purpose of improving the resistance to water passing.

I don't see it as an indictment for Apple to put the pink stickers inside devices. I had a battery replacement warranty denied on my Macbook; said there was water intrusion. I was initially outraged until I recalled the time that I did actually get the laptop significantly wet (partially submerged) and quickly drained and dried it out and felt relief that "Oh, phew! It still works..." And it did still work and only several months later I noticed an unusual battery drain.