An easy way to reproduce it:
cd /tmp/; rm -rf bzr01; mkdir bzr01; cd bzr01; bzr init .; mkdir dir; touch dir/song.mp3; bzr ignore '*.mp3'; bzr add dir; bzr status; bzr shelve --all
An easy way to reproduce it:
cd /tmp/; rm -rf bzr01; mkdir bzr01; cd bzr01; bzr init .; mkdir dir; touch dir/song.mp3; bzr ignore '*.mp3'; bzr add dir; bzr status; bzr shelve --all