解决办法：

打开include/userlogin.class.php

找到

1. function exitUser()

2.    {

3.        ClearMyAddon();

4.        @session_unregister($this->keepUserIDTag);

5.        @session_unregister($this->keepUserTypeTag);

6.        @session_unregister($this->keepUserChannelTag);

7.        @session_unregister($this->keepUserNameTag);

8.        @session_unregister($this->keepUserPurviewTag);

9.        DropCookie('dedeAdmindir');

10.        DropCookie('DedeUserID');

11.        DropCookie('DedeLoginTime');

12. $_SESSION = array();

13.    }

替换为：

1. function exitUser()

2.    {

3.        ClearMyAddon();

4.        #@session_unregister($this->keepUserIDTag);        

5. $_SESSION[$this->keepUserIDTag] = $this->userID;

6.        #@session_unregister($this->keepUserTypeTag);        

7. $_SESSION[$this->keepUserTypeTag] = $this->userType;

8.        #@session_unregister($this->keepUserChannelTag);        

9. $_SESSION[$this->keepUserChannelTag] = $this->userChannel;

10.        #@session_unregister($this->keepUserNameTag);        

11. $_SESSION[$this->keepUserNameTag] = $this->userName;

12.        #@session_unregister($this->keepUserPurviewTag);        

13. $_SESSION[$this->keepUserPurviewTag] = $this->userPurview;

14.        DropCookie('dedeAdmindir');

15.        DropCookie('DedeUserID');

16.        DropCookie('DedeLoginTime');

17. $_SESSION = array();

18.    }