Fixed bug in WP_Option

@@ -11,17 +11,20 @@ class WP_Option implements ArrayAccess, Countable {
         $this->_ns   = $ns;
         $this->_ns   = $ns;
         $this->_data = get_option($ns);
         $this->_data = get_option($ns);
 
 
+        $changed = false;
         if (is_array($defaults)) {
         if (is_array($defaults)) {
-            foreach ($this->_data as $key => $val) {
-                $defaults[$key] = $val;
+            foreach ($defaults as $key => $val) {
+                if (!isset($this->_data[$key])) {
+                    $this->_data[$key] = $val;
+                    $changed = true;
+                }
+            }
         }
         }
 
 
-            if ($this->_data != $defaults) {
-                $this->_data = $defaults;
+        if ($changed) {
             $this->save();
             $this->save();
         }
         }
     }
     }
-    }
 
 
     public function offsetExists($var) {
     public function offsetExists($var) {
         return (isset($this->_data[$var]) ? true : false);
         return (isset($this->_data[$var]) ? true : false);