I know there was a previous thread on this, but I can't find it! In any case, I had a rattle coming from the area of the Package Tray. My local Acura dealer (Hopkin's Acura of Fairfield) had replaced one of the rear struts in an attempt to get rid of the noise, but I didn't do the job. From this forum I got a copy of Acura Service Bulletin 04-043 and took it to them. Two hours later, no more rattle.

For what it is worth, I do think that Hopkin's Acura has a good Service Department. Both them and the Parts department have treated me well.