I found that my Music files have all been duplicated. My Music library is double the size of what it should be, 122Gb! Looking in iTunes, everything seems normal. No duplicates. All is fine. In Finder, every file is duplicated and each one has <space>1 appended to the name before the extension mp3 or m4a etc. Even videos files. All are dated 9th September which is the same date that CoverScout has, so that points to a connection there. I have tried to delete some of the <space>1 files but these are the ones that iTunes has linked to so they appear as missing in iTunes even though the originals are in the same folders as the duplicates. So I'm recovering the files I just deleted from Time Machine and am trying to work out the best way to sort this mess out without resorting to nuking the whole library and starting again. I don't want to lose all the meta-data which nuking it would do. Going through every folder individually is going to be a nightmare. Any suggestions?