diff --git a/modules/backend/behaviors/FormController.php b/modules/backend/behaviors/FormController.php
index ad9e3713b..f110ef308 100644
--- a/modules/backend/behaviors/FormController.php
+++ b/modules/backend/behaviors/FormController.php
@@ -125,8 +125,9 @@ class FormController extends ControllerBehavior
             $this->controller->formExtendFields($this->formWidget, $fields);
         });
 
-        $this->formWidget->bindEvent('form.beforeRefresh', function ($saveData) {
-            return $this->controller->formExtendRefreshData($this->formWidget, $saveData);
+        $this->formWidget->bindEvent('form.beforeRefresh', function ($holder) {
+            $result = $this->controller->formExtendRefreshData($this->formWidget, $holder->data);
+            if (is_array($result)) $holder->data = $result;
         });
 
         $this->formWidget->bindEvent('form.refreshFields', function ($fields) {
diff --git a/modules/backend/classes/ControllerBehavior.php b/modules/backend/classes/ControllerBehavior.php
index faa7452e9..4a63a8398 100644
--- a/modules/backend/classes/ControllerBehavior.php
+++ b/modules/backend/classes/ControllerBehavior.php
@@ -103,7 +103,7 @@ class ControllerBehavior extends ExtensionBase
          * Loop the remaining key parts and build a result
          */
         foreach ($keyParts as $key) {
-            if (!array_key_exists($key, $result)) {
+            if (!is_array($result) || !array_key_exists($key, $result)) {
                 return $default;
             }
 
diff --git a/modules/backend/formwidgets/fileupload/assets/js/fileupload.js b/modules/backend/formwidgets/fileupload/assets/js/fileupload.js
index 341532184..22373d752 100644
--- a/modules/backend/formwidgets/fileupload/assets/js/fileupload.js
+++ b/modules/backend/formwidgets/fileupload/assets/js/fileupload.js
@@ -164,6 +164,11 @@
             $('.upload-remove-button', $preview).data('request-data', { file_id: response.id })
             $img.attr('src', response.thumb)
         }
+
+        /*
+         * Trigger change event (Compatability with october.form.js)
+         */
+        this.$el.closest('[data-field-name]').trigger('change.oc.formwidget')
     }
 
     FileUpload.prototype.onUploadError = function(file, error) {
diff --git a/modules/backend/widgets/Form.php b/modules/backend/widgets/Form.php
index ced5ff95a..270c45963 100644
--- a/modules/backend/widgets/Form.php
+++ b/modules/backend/widgets/Form.php
@@ -287,7 +287,7 @@ class Form extends WidgetBase
      */
     public function setFormValues($data = null)
     {
-        if ($data == null) {
+        if ($data === null) {
             $data = $this->getSaveData();
         }
 
@@ -312,12 +312,10 @@ class Form extends WidgetBase
         /*
          * Extensibility
          */
-        $eventResults = $this->fireEvent('form.beforeRefresh', [$saveData]) +
-            Event::fire('backend.form.beforeRefresh', [$this, $saveData]);
-
-        foreach ($eventResults as $eventResult) {
-            $saveData = $eventResult + $saveData;
-        }
+        $dataHolder = (object) ['data' => $saveData];
+        $this->fireEvent('form.beforeRefresh', [$dataHolder]);
+        Event::fire('backend.form.beforeRefresh', [$this, $dataHolder]);
+        $saveData = $dataHolder->data;
 
         /*
          * Set the form variables and prepare the widget
@@ -356,8 +354,10 @@ class Form extends WidgetBase
         /*
          * Extensibility
          */
-        $eventResults = $this->fireEvent('form.refresh', [$result]) +
-            Event::fire('backend.form.refresh', [$this, $result]);
+        $eventResults = array_merge(
+            $this->fireEvent('form.refresh', [$result]),
+            Event::fire('backend.form.refresh', [$this, $result])
+        );
 
         foreach ($eventResults as $eventResult) {
             $result = $eventResult + $result;
diff --git a/modules/backend/widgets/form/assets/js/october.form.js b/modules/backend/widgets/form/assets/js/october.form.js
index 7295da269..3606084ff 100644
--- a/modules/backend/widgets/form/assets/js/october.form.js
+++ b/modules/backend/widgets/form/assets/js/october.form.js
@@ -5,22 +5,47 @@
  * - Nil
  */
 +function ($) { "use strict";
+    var Base = $.oc.foundation.base,
+        BaseProto = Base.prototype
 
     var FormWidget = function (element, options) {
+        this.$el = $(element)
+        this.options = options || {}
 
-        var $el = this.$el = $(element);
+        /*
+         * Throttle dependency updating
+         */
+        this.dependantUpdateInterval = 300
+        this.dependantUpdateTimers = {}
 
-        this.$form = $el.closest('form')
-        this.options = options || {};
+        $.oc.foundation.controlUtils.markDisposable(element)
+        Base.call(this)
+        this.init()
+    }
+
+    FormWidget.prototype = Object.create(BaseProto)
+    FormWidget.prototype.constructor = FormWidget
+
+    FormWidget.prototype.init = function() {
+
+        this.$form = this.$el.closest('form')
 
         this.bindDependants()
         this.bindCheckboxlist()
         this.toggleEmptyTabs()
         this.bindCollapsibleSections()
+
+        this.$el.one('dispose-control', this.proxy(this.dispose))
     }
 
-    FormWidget.DEFAULTS = {
-        refreshHandler: null
+    FormWidget.prototype.dispose = function() {
+        this.$el.off('dispose-control', this.proxy(this.dispose))
+        this.$el.removeData('oc.formwidget')
+
+        this.$el = null
+        this.options = null
+
+        BaseProto.dispose.call(this)
     }
 
     /*
@@ -51,13 +76,12 @@
     FormWidget.prototype.bindDependants = function() {
         var self = this,
             form = this.$el,
-            formEl = this.$form,
             fieldMap = {}
 
         /*
          * Map master and slave field map
          */
-        form.find('[data-field-depends]').each(function(){
+        form.find('[data-field-depends]').each(function() {
             var name = $(this).data('field-name'),
                 depends = $(this).data('field-depends')
 
@@ -73,20 +97,37 @@
          * When a master is updated, refresh its slaves
          */
         $.each(fieldMap, function(fieldName, toRefresh){
-            form.find('[data-field-name="'+fieldName+'"]')
-                .on('change', 'select, input', function(){
-                    formEl.request(self.options.refreshHandler, {
-                        data: toRefresh
-                    }).success(function(){
-                        self.toggleEmptyTabs()
-                    })
+            form
+                .find('[data-field-name="'+fieldName+'"]')
+                .on('change.oc.formwidget', $.proxy(self.onRefreshDependants, self, fieldName, toRefresh))
+        })
+    }
 
-                    $.each(toRefresh.fields, function(index, field){
-                        form.find('[data-field-name="'+field+'"]:visible')
-                            .addClass('loading-indicator-container size-form-field')
-                            .loadIndicator()
-                    })
-                })
+    /*
+     * Refresh a dependancy field
+     * Uses a throttle to prevent duplicate calls and click spamming
+     */
+    FormWidget.prototype.onRefreshDependants = function(fieldName, toRefresh) {
+        var self = this,
+            form = this.$el,
+            formEl = this.$form
+
+        if (this.dependantUpdateTimers[fieldName] !== undefined) {
+            window.clearTimeout(this.dependantUpdateTimers[fieldName])
+        }
+
+        this.dependantUpdateTimers[fieldName] = window.setTimeout(function() {
+            formEl.request(self.options.refreshHandler, {
+                data: toRefresh
+            }).success(function() {
+                self.toggleEmptyTabs()
+            })
+        }, this.dependantUpdateInterval)
+
+        $.each(toRefresh.fields, function(index, field) {
+            form.find('[data-field-name="'+field+'"]:visible')
+                .addClass('loading-indicator-container size-form-field')
+                .loadIndicator()
         })
     }
 
@@ -99,7 +140,7 @@
         if (!tabControl.length)
             return
 
-        $('.tab-pane', tabControl).each(function(){
+        $('.tab-pane', tabControl).each(function() {
             $('[data-target="#' + $(this).attr('id') + '"]', tabControl)
                 .toggle(!!$('.form-group:not(:empty)', $(this)).length)
         })
@@ -123,6 +164,10 @@
             .nextUntil('.section-field').hide()
     }
 
+    FormWidget.DEFAULTS = {
+        refreshHandler: null
+    }
+
     // FORM WIDGET PLUGIN DEFINITION
     // ============================
 
@@ -157,7 +202,7 @@
     // FORM WIDGET DATA-API
     // ==============
 
-    $(document).render(function(){
+    $(document).render(function() {
         $('[data-control="formwidget"]').formWidget();
     })