If you check the SEC filing, Vinik sold a large piece of his shares in the time leading up to the production problem announcement. If you compare his selling prices to his cost he did not make much if anything of these transactions. It looks like he had some early news of the production problems.
Well management has more problems now. This a.m. a report came out on Bloomberg that three officers made sold large blocks of their stock (reducing some of their holdings to zero) in late Nov before the production problem was released. At the time of their sale the stock was priced in the mid to low 20s.
I was very exciting about buying the stock at these levels, but with management selling out in the low 20s, I lost some of my excitement. It still seems like a good buy, but large insider trading does not look good.