if you are using the playlist file, there is no need for the /;
hack - that is only needed for the raw stream url e.g. http://mystream.com:8000/;
to play the stream. playlists do not need the semi-colon as that will generally prevent them from being recognised correctly.
to access the playlist for stream #1 with the current version of the DNAS, you need to access it as http://mystream.com:8000/listen.pls?sid=#
trying to access it just as http://mystream.com:8000/listen.pls
will not work (the first will be allowed to work in the next DNAS update, the second is only possible if you set streampath=/stream1/listen.pls in the config file). but for the moment, to access a v2 listen.pls, you need to specify the stream id e.g. http://mystream.com:8000/listen.pls?sid=#
where # is the number of the stream (as is the case for most things with the v2 DNAS).
with the v1 DNAS, http://mystream.com:8000/listen.pls
is all that you need to provide for that.