Rich, you are perfectly correct, that is why I asked if there was any evidence as to PVA "creep". I have frequently (well, several times) glued up two pieces of wood straight off the jointer, and tried to break the joint. The wood always breaks, not the joint. What we are being asked to believe is that somehow, under tension, a glue joint of microscopic thickness somehow becomes plasticised and the glue "slips" but doesn't totally fail? I don't buy that, unless someone can show me hard experimental evidemce to the contrary. I do know that under extreme conditions of heat PVA can plasticize and will reconstitute in normal temperature, so I guess if someone left their guitar in the trunk under a noonday Florida sun, it is just conceivable that the bridge could move, and that somehow it would subsequently "reglue". But under normal conditions I do not believe that a properly fitted joint will fail or creep when glued with fresh PVA no matter how much tension is applied. The wood fibers will break first.

Spaw, I got to get to the bottom of this Gorilla Glue thing. Have you ever tried any other polyurethane adhesives, and if so did they behave similarly?