in IE is error

[EnkiLu]

SparkMD5.prototype.appendBinary = function (contents) {
    this._buff += contents;
    this._length += contents.length;

    var length = this._buff.length,
        i;

in IE is error
contents maybe null

[satazor]

appendBinary is a function that you call (part of the public API), and it expects a string. You can’t call it with null.