Nardo, grasshopper, no, it was the magnesium roof of the Z06. Dealers had a tendency to crack the windshield while performing the TSB.
Sorry Frank, but you're not quite there....the recall was on all 2006 and many 2007 C6's, Z06 or targa. It had nothing to do with the magnesium roof frame, but rather the SMC body colored panel bonded to it.
I avoided the recall on my pristine low mile 2006 Z (took delivery after watching it being built at the factory) until the damn thing actually did separate.
I highly recommend the Z....with better tires, seats, a cam and a tune...it is damn near a perfect daily drivable sports car.
http://www.tonygphotography.net/Car...Sanjays-C6-Z06/10845357_xZpcS#756469351_6PYQ6