I have the latest iTunes running on a PC and a Mac. Both libraries are pointed towards the same media folder on a NAS server via 5G wireless. I usually run a random shuffle. The library size is 160gb. I'm not getting the classic dropouts; ie a sudden gap during a song. But I am getting a more than occasional muting of the volume when a new song plays. This can be fixed by hitting either forward or back. If I do nothing, it will also sometimes fix itself when the next song comes on. Anyone else experiencing this?