I would like to inform you about maybe a little issue.
It concerns charging ipod (5G) trought a car adapter.
I got a "cigar-lighter" which has a female usb plug. (so only ground and +5v connector, no data).
When i plug it to my ipod (with the apple cable) it start rockbox, boot, restart, start rockbox, boot, restart, ... etc.
I found a solution by using the original firmware (only when i want to charge my ipod in the car).