             @cur = list[next]
 
         setCur: (sid) ->
-            sid = sid + ''
+            sid = @_formatSid(sid)
             unless sid in @list
                 @add(sid)
-            @cur = '' + sid
+            @cur = sid
 
     Events.mixTo(Playlist)
     Playlist


        prev: ->
            list = @list
            i = $.inArray(this.cur, list)
            l = list.length
            prev = i - 1



        next: ->
            list = @list
            i = $.inArray(@cur, list)
            l = list.length
            next = i + 1

