Jquery ui widget copy in IE7 and IE8

Hello, I run into a strange behavior on jquery ui (tested on jquery 1.8.3, jquery-ui 1.9.2).

I have a parent and child widget, on the _create method of the parent I give the parent's self reference to the newly created child.

When I try to access this reference from within the child all the function and properties declared after the building of the child are not available.

(function ($) {

$.widget("ui.parentWidget", $.ui.mouse, {

version: "@VERSION", widgetEventPrefix: "parentWidget",

_create: function () {

var self = this;

self.child = $("<div/>")

.childWidget({ parent: self })

.appendTo(self.element);

self.parentName = "parent";

},

parentFeature: function() {

return "feature";

},

getChild: function() {

return this.child;

},

updateChild: function () {

var self = this;

self.child.childWidget("update", self);

}

});}(jQuery));

The child widget

(function ($) {

$.widget("ui.childWidget", $.ui.mouse, {

version: "@VERSION", widgetEventPrefix: "childWidget",

_create: function () {

},

childParent: function () {

return this.options.parent;

},

updatedParent: function() {

return this.newParent;

},

update: function(parent) {

var self = this;

self.newParent = parent;

}

});

}(jQuery));

Now to test my output I just create a parent retrieve the child and read its parent and updated parent and read them.

var parent = $("<div/>").parentWidget();

parent.parentWidget("updateChild");

var child = parent.parentWidget("getChild");

var childParent = child.childWidget("childParent");

var updatedParent = child.childWidget("updatedParent");

childParent.parentName or childParent.parentFeature() are undefined on ie7 and ie8 and works fine everywhere else

updatedParent possesses all its content.