Its been discussed on a Z8 forum.
"I've just returned from Cleveland BMW. As a goodwill gesture they fully inspected my '01 (3,300 miles) regarding the alleged structural shortcomings. They found nothing wrong with my car. The shock towers, frame, suspension components are all per factory specs and show virtually no signs of damage or stress. They put it on the rack and found all alignment settings in-check and provided me with a copy of the readings noting that the car was not loaded with weights (ie. sandbags) to replicate true loading conditions. I gave them a printed copy of the Business Week Online Z8 article. It is my humble recommendation that all Z8 owners make an appointment with their dealer and have their cars inspected and therefore documented for this matter. If the "fur is going to fly" with BMW, we must all have established a baseline of data for them to work with."
Discussion here:
LINK