09 CC here. I have an older iPod nano and the charging is intermediate at best. Not the cable. I think the RNS 510 just dosent like older iPods. Works fine with my iPhone. With the exception of not change titles on screen.
I have a 2010 CC and been having problems with the ipod. Every time it goes to the next song it skips in and out for about the 2 first seconds of the song the it plays normally. You think this might be the cable or some kind of program?