He's right. Mine doesn't skip, or cut out unless the earbud wire is pulled while running. I did notice that while running on a treadmill, the placement of the ipod is key. Placed on the treadmill, it does cut out - until you make contact with the side handles. In your pocket or strapped to your arm, it is fine. Kinda weird.
Sounds like some kind of short is going on there. Weird.
That's what I originally thought. Either that, or a headphone problem. After swapping out the headphones without success, I put the ipod in my pocket while running, which eliminated the problem.
Perhaps my negative energy was causing some kind of interference.
I threw this one around my office, and the best thing we could come up with is you're generating a static charge. When you touch the hand rails, you ground yourself and the charge goes there. When you don't, the charge tries to go through the headphone wire, shorting it out a bit.
Someone here also said the electric field of the treadmill motor could be doing something too.