New 15" PowerBook - Fan sounds like it's breaking!

Hi,
I've had one of the new 15" PowerBooks for a couple of weeks, and in the last few days i've noticed that when the fan comes on, it sounds like its about to break - sort of like its grinding against another component when it turns. I know what the fan should sound like - sort of a "whooosssh" sound as it was when it arrived, and as was in my previous 12" PowerBooks - and it's not like this, its a much louder, harsher sound which really distracts me from my work. I'm concerned that the fan isn't blowing correctly, causing the inside to overheat.
Does anybody else have this problem? If I took it to my local Apple Store Genius Bar, would they be able to take it from me for repair? I haven't been to an Apple Store, or used their Genius Bar before, so i've no idea how it works.
Cheers,
Nick

Not had this problem.
If you want to use the Genius Bar you have to make an appointment - best thing to do is to go onto the store website at exactly 10am and make an appointment - otherwise, if the store is busy you might not get anyone to speak to you. If they agree it's a problem then they'll send it out for repair. If you're within 14 days or so then they may swap the machine out instead. Advantage of the Apple store is that you can compare machines.
Or
you could call Applecare and they may agree to send you a label to ship it out to them.
Best of luck.

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