I apologise if this is well known but I have searched.
When you have both a video folder and a music folder on the same USB stick you can't easily move between the two...I'm sure I saw something about a workaround for this a week or so ago but can't find it now. It seems easier with the remote as it has the 'exit' key....
Also if listening to USB music files then changing to any other function I can't go back to the USB, the system comes up with 'No support file'. I have to remove and replace the USB stick to reinitialise it which is annoying...not sure if that one has been mentioned but searched for the 'no support file' string and couldn't find anything.
I don't have an iPod...I must be the only person the planet it seems and would like to use USB for a long trip we have coming after Xmas.