As a temporary workaround I have edited steal.js with the following:
- ConfigManager.prototype.addSuffix = function( str ) {var suffix = this.attr('env') === 'development' ? undefined : this.attr('suffix')if ( suffix ) {str = (str + '').indexOf('?') > -1 ? str + "&" + suffix : str + "?" + suffix;}return str;}
Basically I am just unsetting the suffix property when in development mode so IE will load.