If you do not want to run the full update, here's the modification you can do to fix this error.

开启expires模块，a2enmod expires

然后在.htaccess文件中添加以下内容：

To Remove the Joomla Copyright Info. that is displayed in "Mobile Joomla" at the Footer,

For Joomla 2.5.x

打开文件 /libraries/joomla/document/html/renderer/head.php

搜索 generator

添加相应的meta语句

I propose some apps and plugin for Jomsocial. All of these has been corrected to work with jomsocial 2.6.x ans Joomla 2.5

SQL Tables corrected for image apps in J!1.5

All apps and plugin is in English of course and in french

In this package, you can find :

修改 /language/zh-CN/zh-CN.localise.php 文件中的数字

分别找到 getLowerLimitSearchWord 和 getUpperLimitSearchWord 这两个变量，它们就代表搜索字串的最小长度和最大长度。

找了半天，找到这个js。

1、找到 components/com_community/assets/validate-1.0.pack.js 这个文件

administrator/components/com_mtree/mfields.class.php 第2522行，unset($arrTags[$i]);加注释如下： //unset($arrTags[$i]);