My '08 TCH does have a rattle (creaking really) in the headliner. I do have a moonroof but it's not there (nor is it affected by the opening/closing of the moonroof).

It is in the headliner but for me it stops if I push up in the center of the roof where it meets the windshield. The windshield glass is quite solid.

My dealer claims that they have never heard of this with an '08 TCH. Though I do think denial is often an initial response. I've avoided bringing it in. So far just pushing once (after I found the source) has stopped it. I'm sure it will return but there does seem to be room to insert some kind of shim (cardboard/insulation) as discussed with the '07 windshield problem. This problem is worse (louder) in cold weather but it has been constant through 70 degree weather.

Funny how such a small thing can be that annoying.

Don