I found that when I fitted my nano. Two of the fittings you get look very similar but one will not fit with the nano at all. I used the fitting with 7 stamped on it. I had to put the nano in first, then slide the fitting over the top of it. A firm push down, and a perfect, tight fit.Shockwatches said:I have no problem with my nano. But I cant get the dock to fit right, too tight.