Do yourself a favor, and check this area every once in a while to make sure the clip hasn't come off. (There's a small metal clip there that holds the pin through the hinge.) If you discover you've lost that clip, it is a stainless steel 3/16" E-clip. (The local Home Depot did not stock stainless when I went to replace mine, so this is a painted/coated steel clip shown here below). Super unlikely to happen to anyone else. But since it happened to me, it could happen to others. With a little inspection, the mod to keep this from happening at all in the future should be pretty obvious, so I'll let you figure it out for yourselves.
http://www.tetongravity.com/forums/a...2&d=1203357062