Light and dark marks on display

Hi!
I've had my MB for nearly a year now. About three weeks ago I noticed some kind of light marks on the display - two in total, got the look of little fuzzy hairs in the display, about 0,5 cm long. Handed the book in at a retailer nearby, they said it's covered by the warranty and they replaced the display.
So I got it back a week ago and the new display has a similar, but smaller mark like the ones on the old display. But this time hardly noticeable, so I don't care. But: there are two marks in the middle of the screen. They look like smudge, but the display is completly clean. They are also longer, as roughly 3-4 cm... Also these are only noticeable when there is dark motion on the screen, as in movies or games (it freaks me out when playing stuff like Tomb Raider or UT2004!).
I guess this is something that screams for another replacement of the screen... or is this like a pixelfailur and is just hard luck? How come Apple uses kind of cheap displays for their mobile products? I deal with a lot of different laptops and TFT displays on a daily basis and have never come over something like this...
Message was edited by: pr33m0

I went to my local apple retail store today due to having a slightly bent iPhone 6 plus, and he basically said its my fault and they won't do anything about it but I am in Australia and I think it depends on which genius you get. this is pretty poor if you ask me. So don't worry, you're not the only one who has a bent iPhone

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D. Try to disconnect all devices from your computer's FireWire and USB ports.
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http://www.apple.com/itunes/download/
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http://www.apple.com/support/ipod/five_rs/
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Intermediate Level
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1. Open the disk utility, hope your iPod appears there (left hand side), highlight it
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3. Go to Tab “Erase” , choose Volume Format as “MAC OS Extended (Journaled), and click Erase, again if fails, skip it and go to 4
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You can’t accept the re-sell value of your broken iPod
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Last Resort Level
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http://eshop.macsales.com/tech_center/index.cfm?page=Video/directory.html
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http://discussions.apple.com/thread.jspa?messageID=2438774#2438774
Have I tried these myself? No, I am afraid to do it myself as I am squeamish about tinkering inside electronic devices, I have few experiences that either I broke the parts (which are normally tiny or fragile) or failed to put the parts back to the main case. Therefore, I agree with suggestion to have it fixed by a Pro.
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Exclamation point and folder and nothing else
Spank your iPod
http://www.youtube.com/watch?v=3ljPhrFUaOY
http://discussions.apple.com/thread.jspa?messageID=3597173#3597173
Exclamation point and folder and nothing else
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http://discussions.apple.com/thread.jspa?threadID=435160&start=0&tstart=0
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Meeting the Sad iPod icon
http://askpang.typepad.com/relevant_history/2004/11/meeting_the_sad.html#comment -10519524
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iPod Photo: unhappy icon + warranty question
http://discussions.apple.com/thread.jspa?messageID=2233746#2233746
4th Gen iPod Users - are we all having the same problem?
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http://discussions.apple.com/thread.jspa?messageID=2237714#2237714
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http://discussions.apple.com/thread.jspa?messageID=2242018#2242018
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http://discussions.apple.com/thread.jspa?threadID=412033&tstart=0
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http://discussions.apple.com/thread.jspa?threadID=443659&tstart=30
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http://discussions.apple.com/thread.jspa?messageID=2420150#2420150
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http://discussions.apple.com/thread.jspa?messageID=3786084#3786084
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