I met the problem on Leopard again. Today when I tried to ejected my SD card reader, I saw the error message
The disk SDStorage is in use and could not be ejected.
Try quitting applications and try again.
( SDstorage is my SD card label. )
I had no idea which application was using the card reader. After quitting most of my applications, the error popped whenever I tried to eject the disk. Then I found how to eject it by force, here is how:Read more >>