Power adapter 60w noise

I have a week old MB Alum 2.4ghz model and have noticed that the 60w power adapter has a squealing sound, which you can hear quite easily in a semi-quiet room, or if you put your ear up to the adapter, the sound is even more noticeable....it stills charges, but there is the sound!
....so just wondering if this is normal or should i be contacting Apple for a replacement?
i have tried the 60w power adapter from my 2007 MB (white) model and there is no sound from this one!
cheers

I had a similar problem but opposite- mine would make noise when the MagSafe was connected! After testing with a different power cord my computer made the same noise. Due mainly to another bug with my Airport Card, Apple is finally replacing the logic board and Airport card- hopefully this will eliminate the problem.
You may want to try resetting the Power Management Unit to see if this fixes the problem:
http://docs.info.apple.com/article.html?artnum=303319
Check out these other discussions on this topic:
http://discussions.apple.com/thread.jspa?messageID=2182134&#2182134
http://discussions.apple.com/thread.jspa?messageID=2533379&#2533379
Macbook Pro / Power Mac G5 Mac OS X (10.4.6)
Macbook Pro / Power Mac G5 Mac OS X (10.4.6)

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Message was edited by: iJny9956

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where can I get the power adapter for
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http://www.ebay.com/sch/i.html?_nkw=macbook+power+adapter&_sacat=0&_sop=12&_dmpt =Apple_Laptops&_odkw=macbook+power+adapter&_osacat=111422&_trksid=p3286.c0.m270. l1313
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Power adapter 60w noise

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