I just recently purchase a kingston 133x 16GB CF card.
I have exactly the same one 2x 8GB and 2x 16GB
all of them are fine when used with my 7D
But the new card seems to be very slow. It took a couple of seconds just to delete a picture.
Also if I were shooting a lot in a couple of seconds, it became very slow writing to it.
I just check the files, and in every couple of shots the jpeg files were corrupted, the pictures would be weird looking.
Is this because I have a bad CF card or it's something else?
My other cards is perfect (same exact cards as the the problem one)