years ago a friend had a collection of dan armstrong plastic-body guitars. he spent years (pre-Internet era, obviously) tracking down models that weren't the usual clear plastic, as these were much rarer. when i asked why they were rarer, he explained that armstrong had discovered that the tinted plastic bodies were fine everywhere except on stage in front of bright lights: the energy they absorbed caused the body to expand enough to cause major intonation problems as a concert went on.
the things you learn playing guitar ;-)
"Patsy had the drug tolerance of Keith Richards and the moral rectitude of Brian Jones." - Dr. Walter Bishop, "Fringe"