I have the same friggin' problem, only mine's the rear driver's side. I have replaced the latchpost, moved the post in, moved it out, moved it up AND down, loosened and retightened the hinges while the door was shut AND open. I have pulled the door panels and found nothing loose inside. I took the problem out of my sig, just in case ignoring it would help it go away. I'm thinking rear STB's and SFC's might be the only answer, since it's gotta be body flex around the door that causes this. It gets better and worse, but hasn't ever gone away. Right now it's only bad on rough roads. Good luck - if you fix yours, tell me how you did it!
Mostly I've just been turning up the stereo...
<small>[ March 05, 2004, 11:22 PM: Message edited by: shobikes ]</small>