According to Engadget (http://www.engadget.com/2007/10/31/sonys-sonicstage-cp-contains-playlist-security-hole/) SonicStage CP 4.3 contains playlist security hole ! "The bug is triggered by .m3u playlists that contain over 1000 characters and there are already sample exploits floating around, so those of you still rocking the ATRAC action may want to avoid downloaded playlists until things get patched up."