Backbone model.destroy() invoking error callback function even when it works fine?

I have a Backbone.js model that I'm trying to destroy when the user clicks a link in the model's view. The view is something like this (pseudocode because it's implemented in CoffeeScript which can be found at the bottom of the question).

var window.ListingSaveView = Backbone.View.extend({
  events: {
    'click a.delete': 'onDestroy'
  },

  onDestroy: function(event){
    event.preventDefault();
    this.model.destroy({
      success: function(model, response){
        console.log "Success";
      },
      error: function(model, response){
        console.log "Error";
      }
    });
  }
});

When I click the delete link in the browser, I always get Error logged to the console even though my server records successful destruction of the associated database record and returns a 200 response. When I refresh the page (causing the collection to re-render from the DB) the model I deleted will be gone.

One interesting this is that when I log the response in the error callback, it has statuscode 200 indicating success but it also reports statusText: "parseerror" whatever that means. There is no error in my server logs.

What am I doing wrong?

This is the response from the server:

  Object
    abort: function ( statusText ) {
    always: function () {
    complete: function () {
    done: function () {
    error: function () {
    fail: function () {
    getAllResponseHeaders: function () {
    getResponseHeader: function ( key ) {
    isRejected: function () {
    isResolved: function () {
    overrideMimeType: function ( type ) {
    pipe: function ( fnDone, fnFail ) {
    promise: function ( obj ) {
    readyState: 4
    responseText: " "
    setRequestHeader: function ( nam