wordpress 2.7版本成功升级'Wordpress upgraged successfully'

但是总是在告示板显示黄色出现下面的提示

'An automated WordPress update has failed to complete - please attempt the update again now'

方法是删除在WordPress的根目录下的 一个 .maintenance 文件即可解决该问题。。。。
Tools Upgrade SubPanel, Troubleshooting