Hi Ladies, I am not usually around in this section, a Mulberry Girl at heart. I have a couple of MJ bags and am concerned the leather on my MJ Ivory Stam is wrinkling on the back. Is this normal.....................will it get worse? It's an older model about 2006 I think, in gorgeous condition and gets very occasion use. I remember seeing the wrinkling on a couple of quilted sections on the back previously but it seems to be getting worse. What can I do I feed and nourish her and always keep in the dustbag???????????