Checked all drives and the two files are missing. Does this mean that LW can only hash and memorise up to a certain size of total files? This is an important issue for the future as I can't imagine I am the only person slowly ripping all their music partly as backup, partly because I'm anally retentive but mainly to allow me to access via my iPod. It also allows me to set up playlists that can be set to play for hours through my home on iTunes. These are the primary reasons for ripping but once done then I'm happy to share. I would imagine this would be the same for many people. My total collection will be less than 100gb but then I will start on vinyl which may add a few more gbs! LW will need to take this development into account in the future - not just because of me as I have no relevance at all but I would guess I'm not alone in doing this.