I had some problems before updating to the newest firmware, not it seems ok.
In any case I see no point in not using a card reader, I mean you spent thousands euros on a camera and lenses I suppose, I don't think 10 bucks would be ruining your bank account.
Beside this using a memory card reader is so much better than direct downloading from the camera for several reasons:
- You won't use any battery.
- It's way faster.
- You can keep using your camera with another memory card while downloading the pictures.
- And last but not least...yes you can store other kind of files in the CF...firmware files included.