I see the same thing with my '05. I originally thought it was the clutch not being fully engaged and needed adjusted, however, I have not confirmed that is not the problem. It has happened to me 12-15 times in the last few months. I noticed the engine light comes on. So far, at least, if I turn it off, remove the key, re-insert and it starts every time. This is something I intend to discuss with the dealer and get fixed before my warranty runs out (sometime this summer = 36K). If anyone determines what it is, please post here.