diff --git a/source/Ox.UI/js/List/List.js b/source/Ox.UI/js/List/List.js
index c3ab788f..200a0ce1 100644
--- a/source/Ox.UI/js/List/List.js
+++ b/source/Ox.UI/js/List/List.js
@@ -1819,14 +1819,14 @@ Ox.List = function(options, self) {
             id = args.shift(),
             pos = Ox.isNumber(id) ? id : getPositionById(id),
             $item = self.$items[pos],
-            data = $item ? $item.options('data') : {};
+            data = $item ? $item.options('data') : {},
+            updateItems = false;
         if (arguments.length == 1) {
             return data;
         } else if (arguments.length == 2 && Ox.isString(arguments[1])) {
             return data[arguments[1]];
         } else if ($item) {
             Ox.forEach(Ox.makeObject(args), function(value, key) {
-                var index;
                 if (key == self.options.unique) {
                     // unique id has changed
                     self.options.selected = self.options.selected.map(function(id_) {
@@ -1837,13 +1837,15 @@ Ox.List = function(options, self) {
                     self.options.items[pos][key] = value;
                 } else if (self.items) {
                     // items array was passed to initialize the list
-                    index = Ox.getIndexById(self.items, id);
-                    self.items[index][key] = value;
-                    self.options.items.update(index, self.items[index]);
+                    self.items[Ox.getIndexById(self.items, id)][key] = value;
+                    updateItems = true;
                 }
                 data[key] = value;
             });
             $item.options({data: data});
+            if (updateItems) {
+                self.options.items.update(self.items);
+            }
             return that;
         }
     };
diff --git a/source/Ox/js/Array.js b/source/Ox/js/Array.js
index 000e5583..d627978c 100644
--- a/source/Ox/js/Array.js
+++ b/source/Ox/js/Array.js
@@ -306,11 +306,10 @@ Ox.api = function(items, options) {
         ret = Ox.extend(
             api.cache ? Ox.cache(fn, {async: true}) : fn,
             {
-                update: function(index, item) {
-                    items[index] = item;
+                update: function(updatedItems) {
+                    items = updatedItems;
                     api.cache && ret.clear();
                     sortBy.clear();
-                    return items;
                 }
             }
         ),