e is not defined when using Request.send()

[jamie]

Request.send() results in 'e is not defined' error:

window.addEvent('domready', function() {
    var JSONreq = new Request.JSON({
        url: 'http://beta.slacked.org/feeds/get_feed',
        method: 'get'
    }).send();
});

It appears to be a problem with this part within send() (..or it could just be that my understanding of Request/send() is faulty - in which case, sorry for the noise)

this.headers.each(function(value, key){
    if (!$try(function(){
        this.xhr.setRequestHeader(key, value);
        return true;
    }.bind(this))) this.fireEvent('onException', [e, key, value]);
}, this);

[jamie]

Oops. Should have said this is with mootools trunk r1512.

[kamicane]

fixed in [1514]