12th April 2007, 11:23 PM
There are plenty of plausible explanations. It is far more likely it just got scratched at some point than it was somehow warped from centrifugal forces.
"On two occasions, I have been asked [by members of Parliament], 'Pray, Mr. Babbage, if you put into the machine wrong figures, will the right answers come out?' I am not able to rightly apprehend the kind of confusion of ideas that could provoke such a question." ~ Charles Babbage (1791-1871)