When I got my wife's SE and noticed 2 tiny scratches on the front wheel I made a picture right away and emailed nashbar. Right nex morning I received reply to send it back. I used paid postage and in 7 days i got a new wheel.
No worries at all.
If it bothers you then why you did not address it right away?
If it is not, then why go to the forum?

It should not be a problem to exchange the frame.
It should not be a problem to keep it and ride as it is.

It is all about how you feel... If there is any tiny bitter feel then I would exchange...