To test for yourself you'll need a tool to monitor bandwidth.

Here's a freeware monitor with a graphical display:
http://download.cnet.com/downloads/0...st-5-6.8035913

While watching bandwidth these issues become obvious, especially when changing urls.

Here's a Flash 4 application that loads swfs containing streaming audio to emulate a jukebox.

http://www.myrecords.com/mixtape/mixtape.html

When a user clicks forward or back an swf is unloaded and a new one loaded. Pressing stop unloads the swf. All this is done in a designated _level.

With a version 4 or 5 player the download stops when the swf is unloaded. This allowed the user to switch songs with only a short pause pressing forward and back.

With the version 6 player pressing forward or back only adds to the download. Doing so 3-5 times will create a large enough download cache that things freeze until the downloads are completed.

Use the bandwidth monitor with this url. Get a new song to play and press stop. Notice the download continue. Press forward a few times until it locks and then change the browser url. Make sure to dump the browsers cache every so often.