Okay, this happened to me. Posted about it in the Tech' forum. But, the quick run down is this:

Started Squeeking.
(the Wife) took it in. They tried just lube'ing it up from the outside.
No Joy.
(I get back to Town) took it in. They opened the whole assembly up, cleand it out and re-lube'd it up.
... Joy! ...

Now its quieter than it ever was before (I don't hear it unless I'm stopped and playing with the button with the radio's off).