My HTML5 audio player, when running inside of IE9, has trouble playing audio files located on a server running Apache Tomcat. For example, it'll never load the file at this path:
http://www.siascend.com/repository/audios/1017_Q1.mp3
but happily plays the same file located @:
http://hirebrodie.com/demo/audio/1017_Q1.mp3
Either path works fine when the player runs in Chrome or Safari. Why wouldn't it work in Internet Explorer? Is this a known issue with the IE implementation of HTML5 audio?