Re: Mystery creak, and associated sanity loss! Help? :D
Comic Relief:
When I was 18, in 1968, the lady across the street had a Cadillac with a rattle in the door. She kept taking it in, kept checking the window and all parts associated with the door. Finally, the Cadillac dealer had had enough, and removed the entire door. They tore the door down completely and in the bottom of the door was a loose coke bottle with a note in it: The note said "So you finally found the source of the rattle!"
I once heard a joke about this, but this happened in Deerfield Beach, Florida.