I got a 30 gig iPod from my gf for Christmas. I love it, but one thing that I'm worried about is this message; I get it every time I connect to my mac. I click ok and then I can carry on as normal (ie. copy songs etc). Should I be worried? Also, I did a test on the battery (playing all song in order, no backlight and half volume with no equalizing) and got 12.5 hours of audio. Is this ok? Apple says 20, but I don't believe everything I read.