Nope, nothing set in the NAS look for anything - at the time this happens the NAS is actually on standby, it's also such a basic one it probably doesn't even know iPods exist
iTunes not looking for media on the NAS either, I recreated the library from scratch a couple of weeks ago and all the media is definitely on the local drive.
Must just be iTunes looking at mapped drives like punky said, that's all it possibly can be - which means it's probably impossible to fix without unmapping the damn drive.....