Window/Door Rattle

[mcdill]

When my driver window is rolled down, and i close the door, the glass sounds like it rattles around inside. It sounds as if the door was slammed hard enough, the window would shatter. With the window up, closing the door sounds solid, as it should. I noticed that when the window is rolled up the last half an inch, the top of the door panel moves out, towards the interior. Is the window not aligned properly, or is the door panel not on right, or is it something else? The door panel rattles slightly when listening to music.
Thanks,
Matt
94 E320 139k