Thanks, Awesome Donkey. I'm not moving files, like copying them or dragging them to playlists. What I mean is, i'll get the lag when starting a track, but then clicking on another track within the same album, there's no lag. The lag is very inconsistent and hard to ascribe to anything in particular. Like i mentioned, if i start a track from a different album, it might happen, it might not. Under Memory Playback in settings, I've got "No memory playback" checked.