I have some IE9 preloading problems.
Not unlike this post.
http://impactjs.com/forums/help/preloading-problems

The problem is that IE9 refuse to load the sound files
and we get a error:

SCRIPT5022: Failed to load resource: media/music.mp3

I can successfully suppress the error and get the game loading by doing Dominic's Fix

change these lines in sound.js
loadCallback( path, true, ev );

This doesn't really fix the problem. it makes the game loadable.
Then IE randomly loads my sound.
Sometimes can hear the background music, and sometime sound effects.

I also tried to reduce the number of sound channels in sound.js,
That helped a little. but same problem.

Why cant i make IE load my sound assets properly?
Anyone have an idea? or a workaround for this?