Is there a secret Toyota Prius accelleration problem

UPDATE: A NY Times blog discusses Toyota's failure to document test procedure as a problem. Engineering and testing requires documenting _everything_.

Steve Wozniak, one of the most influential engineers of our time, has reported a problem with his 2010 Toyota Prius that Toyota denies. Anyone else experience this?

And, Transportation Secretary LaHood admits Toyota is a little 'safety-deaf' and resistant to the idea of, well, problems with their products.