I know this has been beat to death, but I'm wondering if the latest Macbook buyers have been experiencing any issues with their computers. I had one with the moo, returned it, and am excited to get another, hopefully without that dreaded noise. So, is it just a thing of the past? Or are there still some who have the problem? I'm really looking to hear from someone who had one with the noise, and doesn't have it anymore with a newer model. Thanks