go in a folder with .ogg files view as audio play a file click Back in nautilus music continues to play ( should stop ) double clic on the folder with .ogg files which you just left nautilus icon spins, but it won't enter the folder until nautilus-audio-view is killed
This is fixed in nautilus-media 0.2, but it depend on gstreamer/gstreamer-plugins 0.5.2, which are not in the tree yet.
In rawhide now. You need latest nautilus and nautilus-media.