MediaWiki 数据丢失

OS: 
[root@atyu30 ~]# uname -r -m -i -o
2.6.18-92.el5 i686 i386 GNU/Linux
[root@atyu30 ~]# cat /etc/redhat-release 
Red Hat Enterprise Linux Server release 5.2 (Tikanga)

PHP:
[root@atyu30 ~]# php -v
PHP 5.2.8 (cli) (built: Feb 20 2009 22:46:43) 
Copyright (c) 1997-2008 The PHP Group
Zend Engine v2.2.0, Copyright (c) 1998-2008 Zend Technologies

MySQL:
[root@atyu30 ~]# mysql -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 28
Server version: 5.1.30-log Source distribution

Reading history-file /root/.mysql_history
Type 'help;' or '\h' for help. Type '\c' to clear the buffer.

mysql> 

MediaWiki:
mediawiki-1.15.4.tar.gz

编辑一个新条目：

查看页面历史记录

页面丢失：

这个现象不是出现在某个“条目”上，而是在历史条目中大量出现