I just got this about a week ago and now the Delete key isn't working well anymore. It seems like it doesn't go down all the way anymore and doesn't register easily -- I have to hit it about 3 times before it registers. I really don't want to get this laptop replaced as it has a Samsung display I really like (went through two others with dead pixels before, at least one of them LG). At the same time I can't afford to have it in for repairs for a prolonged period. Is this something they can repair "on the fly" in the Apple retail stores?