Odd AC plug issue

A few times I have noticed that the green light on my AC cord for my macbook pro will not be lit up at all. The light only comes back on when I unplug it and then plug it back in. Strange...any ideas?

Yes, I've had that happen with my 4-month-old MBP. First thing to try is [cleaning out the MagSafe connector|http://docs.info.apple.com/article.html?artnum=303240].

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