both front windows rattling, driving me crazy!

The driver's front window has been rattling for over a month now. Last night the passenger's front window started it too. It rattles at the very top of the window. To make it go away, you have to find the "sweet spot" which is somewhere between all the way up and down some, but not so far down that the wind whistles.

Anybody else having this problem? If so, what was the fix?

I'm due in to the dealer shortly to get the wiring harness fixed anyway, so I'll have them look at it then. But in the meantime it sucks!