Uncaught Error(s) when playing live streams?

From line 48 of adapterWebAudio.js
this.audio.addEventListener( 'progress', function ( e ) {
if ( e.currentTarget.duration ) {
_this.progress = e.currentTarget.seekable.end( 0 ) / e.currentTarget.duration;
}
});

Causes an Uncaught IndexSizeError: Failed to execute 'end' on 'TimeRanges': The index provided (0) is not less than the object's length (0).

This occurs when I use sources like shoutcast and icecast.
This is fixable if you nest this condition if(e.currentTarget.seekable.length>0) inside the function.
This doesn't appear to be a problem in Chrome, it just runs through the error anyway. However, I'm guessing/hoping that a similar type of error for the mozilla adapter is preventing firefox from using live mp3 streams (it appears firefox can play and visualize local mp3's just fine).
Awesome project though I'm hooked on the demo.

Read adapterWebAudio.js around line 48 and reproduce the issue with Shoutcast or Icecast live streams. Check the progress handler's seekable range behavior and compare Firefox playback with local MP3s. Done means live streams no longer produce the reported IndexSizeError and Firefox behavior is understood.