I resolved the vibration/rattle noise that I was complaining about for a while, but I still have an annoying 'clunk' eminating from the hatch - but interestingly only on certain types of bumps.
I moved the Sirius antenna to the roof spoiler yesterday, and verified that it's definitely not coming from anywhere in there... so I'm pretty convinced that it has to be the hatch closure itself. But I'm not sure where (?)
I tried the popular adjust-the-bump stops-out trick (which seemed to help a little), and even the felt pad-on-the-bump stops trick (which didn't seem to make any difference at all), but nothing made the clunk go away completely. And the further the bump stops are adjusted out, the more rough the hatch release is... (with the stops adjusted way-out, when I hit the hatch release button, it sounds like it going to rip the catch off the back)
I think I've tried just about everything - does anyone have any other ideas on what could be causing the hatch to clunk on certain types of bumps?