[billboy]

Found a work around to the error message with this piece of code:

if (!Array.prototype.reduce) {
  Array.prototype.reduce = function reduce(accumulator){
    if (this===null || this===undefined) throw new TypeError("Object is null or undefined");
    var i = 0, l = this.length >> 0, curr;

    if(typeof accumulator !== "function") // ES5 : "If IsCallable(callbackfn) is false, throw a TypeError exception."
      throw new TypeError("First argument is not callable");

    if(arguments.length < 2) {
      if (l === 0) throw new TypeError("Array length is 0 and no second argument");
      curr = this[0];
      i = 1; // start accumulating at the second element
    }
    else
      curr = arguments[1];

    while (i < l) {
      if(i in this) curr = accumulator.call(undefined, curr, this[i], i, this);
      ++i;
    }

    return curr;
  };
}