EOS One frame of series is Black - Shutter Problem?

[Pierre Bellavance]

This afternoon, I was photographing ducks in the sky. I took seven pictures 
within three seconds with my 10D, and the second frame is totally black (no 
image at all), while the first and five last are perfect.

I was shooting on Automatic at ISO 400, and the exposure says it was the 
same for all seven shots: 1/1600 at f/6.3. Is my camera's shutter defective?

Pierre 

*
****
*******
***********************************************************
*  For list instructions, including unsubscribe, see:
*    http://www.a1.nl/phomepag/markerink/eos_list.htm
***********************************************************