If this helps I just got new 24″ imac shot 60 frames. Opened FCPX and was only able to import the first 9 and will not import the remaining 30.
The error reads:
Import Failed
The following clip encountered an error during import and is still referencing media on the camera:
Clip Name: 2012-03-28 11:07:05
Event: TCBY_Mrs.Fileds Uniforms
Original Name: 01012L
Volume: NO NAME