I have a strange problem which has recently started happening. I have all my movies / TV shows stored on a Time Capsule under the lounge TV. Both in iTunes and the Apple TV I am missing covers The only way I have found to get them back is to click 'Get Info', but I don't really want to do this for all the files. Firstly is there an automatic way to 're-build' the iTunes library so all covers reappear? Secondly, how do I stop this happening again in the future?