Window Breakage

[Orbital H2]

Have any of you had problems with rear window breaking? I went out this morning and found my rear window shattered but in tact. called Police (thought it might be vandalism) but under further inspection neither he or I could find anything that lookied like someone had dileberately attempted to break it. I expected to see a spiderweb eminiating from the point of impact but could see none. after talking to a frined at a BMW dealer he said that some vehicled have had problems with stress cracks in winshields and other windows.
could use some info to talk to the Hummer dealer

H2 Black Lux, Air Suspension, AEM Intake, soon to be blacked out...
300ZX TT 500Hp, 10.5Sec completely Blacked out, Wolfe Sport 600 Turbo, Billet Aluminum FlyWheel, Carbon Claw RPS Turbo Clutch, Dual Pop Intake, HKS Intercoolers/Exhaust