"Is it possible that the car being on jack stands could have tweaked the car enough to cause the glass to bind as it re-tweaked to its natural state?" "Does anybody think it has anything to do with it being on jack stands prior to glass entry" Rob what is probably nagging your subconsciousness is the idea that the rear glass is a part vital to the structural integrity of the car, and without it being in place the shape will change during jacking. I'm no engineer but that idea sounds absurd and you should eliminate it from your trouble shooting thought process. Sure they flex some, but rather the idea of an imperfection in the seating like Mike D. said sounds more plausible. Is the opening entirely straight sitting on the ground? Is there extreme heat near the suspect cracked areas? Was the glass properly de-burred of all sharp edges? Do you have a seat belt bar mounted to the firewall that might be preloading it? Just shots in the dark. Best of luck, Matt 3584 "Is it possible thatA the car being on jack stands could have tweaked the car enough to cause A A the glass to bind as it re-tweaked to its natural state?" "Does anybody think it has anything to do with it being on jack stands A A prior to glass entry" Rob what is probably nagging your subconsciousness is the idea that the rear glass is a part vital to the structural integrity of the car, and without it being in place the shape will change during jacking. I'm no engineer but that idea sounds absurd and you should eliminate it from your trouble shooting thought process. Sure they flex some, but rather the idea of an imperfection in the seating like Mike D. said sounds more plausible. Is the opening entirely straight sitting on the ground? Is there extreme heat near the suspect cracked areas? Was the glass properly de-burred of all sharp edges? Do you have a seat belt bar mounted to the firewall that might be preloading it? Just shots in the dark.A Best of luck, Matt 3584