OK here's the deal I have the Tour and my wife has the Curve World Edition. I resently bought a larger media card for my Tour and took the 2g card and put it in the Curve. I formated the card once it was in the Curve and proceeded to download songs. When I had a ton of songs on the card, they would only play for the first 15 or 20 seconds of each song then stop. If I take the card and put back in the tour without a format they play to completion. Anyone know what the deal is with the Curve?