My wife has the exact same problem. She is so super sensitive about her macbook pro, that she can't even stand to have finger prints or dust on her screen. I bought it for her as a birthday gift. The first issue happened not even a month after getting it. The battery stopped working and wouldn't hold a charge. Thankfully, they replaced the mac. Why even bring this up? Because, after doing some searching, it seems to me that Apple still has lots of design and quality issues and they are just ignoring them.
Her screen cracked at about the 11th month point. It felt a little like the crack was poking out and not in and so I took it to the Genius Bar. They told me that this was caused by closing the lid on something, that it wasn't covered and it would cost $680 to fix it. I told them that this was NOT caused by the lid closing on something as I know my wife is almost OCD with her macbook pro. I did not pay to have it replaced and it has now been almost a year later.
As a test engineer, I have looked at the crack to see what might have caused it. I noticed that if I close the lid and pick up the macbook pro by the hinge side, palm underneath and thumb on top, that I could feel the lid flex under my thumb. My hypothesis is that this might be enough pressure to crack the screen. It also seems to me that if these cracks everyone is experiencing was caused by closing the lid on something, then why does the crack always seem to be in the same location and not more random locations?
I can't believe that after all this time and all these complaints, that Apple is not looking into this more seriously. Well, I guess I can believe it as it is probably too small of a number of complaints for them to even care about. If anything, they should be concern with what seems to be a design flaw and fix it.