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i had one of those dents on mine too.
called Apple and they sent for a replacement with no questions asked.

got my replacement last friday and currently typing on this forum through it.

get it replaced and be a happy user! :D
 
In retrospect, I'm glad I bought a refurb. Too bad the 2010 15" weren't out yet, but the price savings was fantastic. *knock on wood, or thin apple aluminium*

That's why I'm thinking a refurb unit is the way to go. It undergoes further inspection than the new units do.
 
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