I am having the same problem. (script doesn't work in IE). Does work in Firefox and Chrome.
The problem is that when the script is generated, there are two additional forward slashes created at the following locations - after "your_domain.com" and after the "music1" folder:
Both Firefox and Chrome browsers can resolve this problem but IE cannot.
See Example 1 below which...
I solved this issue by changing the following in the html / php file holding the player:
<param name="movie" value="xspf_player.swf?playlist_url=playlist_generator.php&autoload=true&autoplay=true&shuffle=true" />
TO:
<param name="movie"...
