D'oh! I've only had my iPod for a couple of weeks, and I stupidly go and drop it! Luckily it was in its case (the standard Apple one), and it only fell from a desk onto a carpeted floor. All the same, I gave it a little shake - and to my dismay, I could hear a tiny rattle! The thing is, it's not a big rattle and you really have to shake the thing and listen closely to hear it. I can't seem to remember ever hearing this before, but then again I wasn't listening for it. Has something broken loose inside, or does every iPod have a tiny (and I mean tiny) rattle?
BTW, it works perfectly. I just want peace of mind that it's not going to break down unexpectedly!