I've just got a carbon and have noticed its got 2 serial numbers.

One on the back on the carbon and a completely different one according to rio manager. Any idea which one I should use when getting the mp3 encoder. Not that it matters to me.

I bought 2 of these within 2 weeks from the same supplier. The 1st had 1.02 firmware and the 2nd has 1.32. The 2nd also came with an extra cable. It's a 4" cable with a 1/8" jack plug on one end and a 1/8" jack socket on the other. Any idea what its for?