CPU whistle on 1.83GHz Macbook

My Macbook 1.83GHz has taken to whistling. The noise seems to be coming from the top-right.
After searching Google, I found that Macbook Pro owners have suffered from this problem. Their advice is to install the CHUD tools and use the CPU tool to temporarily disable a CPU core. If I do this, the noise goes away. They also mention switching on the webcam makes it go away. Sure enough, if I turn-on Photo Booth, the noise goes away. The trouble is that this also causes the fans to start spinning up, so one noise is replaced with another.
They also mentioned that Apple isn't doing much about this problem.
What is the current status regarding this problem? If I contact Apple, will they take the problem seriously (I'm in the UK, and my nearest service centre is a substantial distance away)?
Message was edited by: Randy Sparks

It is really hard to say how seriously Apple will take the issue or not. But I recommend NOT using the CHUD tools. Not knowing the cooling controls for the machine, you could seriously jeapordize the life of your machine if the tools are used improperly and the machine overheats.
If your machine's firmware hasn't been updated, check this article:
http://docs.info.apple.com/article.html?artnum=303880
Check also the hardware doesn't show any errors on this test:
http://docs.info.apple.com/article.html?artnum=303081
Make sure the back vent is not blocked:
http://docs.info.apple.com/article.html?artnum=303848
If after doing this, and you have come up with inconclusive results call AppleCare:
http://www.apple.com/contact/phone_contacts.html
If your machine is under an exchange/repair program, call them to get that taken care of:
http://www.apple.com/support/exchange_repair/
This is a user to user forum, and we can't really guess Apple's policy on such issues.
Message was edited by: a brody

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