A basic question for someone who's owned a DSLR for so long. Now that I'm using both the D3/D300 in varying situations I noticed that formatting a CF card in the camera will not necessarily format it completely with two cameras. I'm regularly frustrated when I run out of card and when I get home I notice it's because the D300 (for example) did not format the D3 folder's images. What am I doing wrong? When I format a card I am certain that I need nothing on the card and want to clear it away completely. Thanks in advance.