Hi all

I've had my iPod for about half a year now, and it's worked fine. However recently, why I'm listening to my iPod through my headphones, whenever I use the wheel, the track that is playing starts to 'jump' and judder. This also happens when my iPod is connected to my Logictech dock.
It seems to be doing it on tracks that I have downloaded from the iTunes Store, but I'm not too sure.

Can anyone help me out?

Thanks a lot