fixed #65

var/Typecho/Request.php

@@ -700,7 +700,7 @@ class Typecho_Request
         if ($params) {
             $validated = true;
             foreach ($params as $key => $val) {
-                $validated = empty($val) ? ($val != $this->get($key)) : ($val == $this->get($key));
+                $validated = empty($val) ? $this->__isset($key) : ($val == $this->get($key));
 
                 if (!$validated) {
                     break;

var/Widget/Themes/Edit.php

@@ -134,7 +134,7 @@ class Widget_Themes_Edit extends Widget_Abstract_Options implements Widget_Inter
         $this->widget('Widget_Notice')->set(_t("外观设置已经保存"), NULL, 'success');
 
         /** 转向原页 */
-        $this->response->redirect(Typecho_Common::url('themes.php', $this->options->adminUrl));
+        $this->response->redirect(Typecho_Common::url('options-theme.php', $this->options->adminUrl));
     }
 
     /**