4G iPod Static Issues
Jon Seff, writing on the Macworld Editor's Weblog, gets to the bottom of the problem via a call to Apple tech support.
The answer he's given: If it sounds fine with the Apple-supplied headphones, there's absolutely nothing wrong with the iPod."
Apparently, if you want to use another manufacturers' headphones, expect some static whenever the disc spins up. Fortunately, Seff tells you how to fix it. Even if Apple won't.