I just got a iPod shuffle and I get a "disk not ejected properly" pop up. I have tried it on both sides of my macbook pro and get the same results. The only time it does it is when I take the iPod and move it a bit while it is connected to the computer. Since it does it on both usb ports I ruled those out as being the problem. When the pop up does come up the light on the shuffle keeps blinking like it normally does when charging. Any ideas?