Something loose inside my sub??!

[cdweller]

When I shake my sub, it sounds like there is something "clicking" or moving around, almost to the same effect as when you shake a can of spray paint. Now I know that the rotor is moving around to power the watch, but I am not sure if this sound is indicitive of a potential problem or not. Can anybody else comment - does their watch make this sound? The watch in question keeps good time (+3 secs/day). It was purchased brand new from an AD. Thanks for the advice in advance!!