I have installed several magazine apps and bought the magazines for them. When they went onto my bookshelf they were fine but after a couple of hours the 'Red' one's icon disappeared and now shows just a white box with a grey book in the middle. The next day one of the others the 'Best' icon did the same. I have tried everything but cannot seem to get them back. It is a pain as I cannot tell which one is which and also looks very untidy on my nice neat bookshelf They are correct in my itunes account and I have tried syncing it but that didnt help. Has anyone else had this problem or know how to resolve it.