No! It was clearly a bug. I deleted a single track while listening to it via the menu key (not in the list of music but at player, menu, more, delete). Then, as described, it didnt skipped as usual in 1.4 but kept playing the song and the "deleting..." stood there for 30sek, the app crashed and all the music was gone. Just the songs, the folders and covers etc. remained. There wasnt any question about multiple files to delete, just the usual for a single one. I dont know if its reproducible i didnt tried deleting since, but maybe i will after backing up.