升级X2.5 后打开帖子时 出现 Discuz! System Error

升级X2.5 后打开帖子时 出现 下面情况。。搞半天不知道是怎么回事，麻烦给为帮忙看一下

Discuz! System Error

The property "discuz_application->db" is not defined

PHP Debug

No.	File	Line	Code
1	forum.php	58	require(%s)
2	source/module/forum/forum_viewthread.php	870	include(%s)
3	data/template/9_diy_forum_viewthread.tpl.php	1	hookscriptoutput(%s)
4	source/function/function_core.php	1118	hookscript(%s, %s)
5	source/function/function_core.php	1089	plugin_sina_xweibo_x2->global_footer(Array)
6	source/plugin/sina_xweibo_x2/hook.class.php	36	plugin_sina_xweibo_x2->_start_xweibo(true)
7	source/plugin/sina_xweibo_x2/hook.class.php	266	singleton_sina_xweibo_x2->start_xweibo(true)
8	source/plugin/sina_xweibo_x2/hook.class.php	1306	require_once(%s)
9	xwb/plugin.env.php	28	require_once(%s)
10	xwb/site.env.php	41	discuz_base->__get(%s)
11	source/class/discuz/discuz_base.php	39	break()

没人回答啊，，自己顶

已经解决的，，，，把后台新浪插件关了就行了

修改一下已解决

记住下次升级时再好关闭原先低版本号的插件同时恢复默认风格