Actually there is two things that could happen:
if you turn on your ipod with the remote, it's not detected. You have to unplug and plug again the remote to get it detected. A nice thing, for all accessories, would be that the accessory supply is turned off then on at the end of the boot up process. It should be part of FS10623.
The second thing is the radio icon doesn't appear in the main menu if you are in it when you plug in your remote; you'll have to go in an another menu then go back in order to refresh the main screen.