We've had this happen to a number of ours, seems to be a common fault. Those still in warranty Hitachi have been happy to replace straight away. Those that were out of warranty cost about £270 +VAT.
FCP X has certainly taken a bashing for its lack of pro features.
People in the youtube community like it because it's more advanced than iMovie, but the Pro users aren't happy. As ZeroHour said I think they'll release some sort of update.
http://www.youtube.com/watch?v=VXepNCs_iZo