Since upgrading to 4.2.1 cannot use ifile and a flash drive with the camera connection kit.
This is because of the message,
'The connected USB device requires too much power'
This is because apple have reduced the power output from 100mA to 20mA
Some tend to think this has been done on purpose by apple to stop people using external devices while others think this may be a bug.
I really need this feature.
Hope this has been posted to the correct part of the forum