你论坛的 pre_forum_thread 主题表不存在啊，论坛不完整撒，后台校验下文件用官方文件覆盖下，缺少的数据库表，自己手工建立下撒~
手机建表SQL语句：【以下SQL语句请在phpmyadmin中你的论坛数据库下执行SQL，或论坛后台——站长——数据库——升级】
DROP TABLE IF EXISTS pre_forum_thread;
CREATE TABLE pre_forum_thread (
tid mediumint(8) unsigned NOT NULL AUTO_INCREMENT,
fid mediumint(8) unsigned NOT NULL DEFAULT '0',
posttableid smallint(6) unsigned NOT NULL DEFAULT '0',
typeid smallint(6) unsigned NOT NULL DEFAULT '0',
sortid smallint(6) unsigned NOT NULL DEFAULT '0',
readperm tinyint(3) unsigned NOT NULL DEFAULT '0',
price smallint(6) NOT NULL DEFAULT '0',
author char(15) NOT NULL DEFAULT '',
authorid mediumint(8) unsigned NOT NULL DEFAULT '0',
`subject` char(80) NOT NULL DEFAULT '',
dateline int(10) unsigned NOT NULL DEFAULT '0',
lastpost int(10) unsigned NOT NULL DEFAULT '0',
lastposter char(15) NOT NULL DEFAULT '',
views int(10) unsigned NOT NULL DEFAULT '0',
replies mediumint(8) unsigned NOT NULL DEFAULT '0',
displayorder tinyint(1) NOT NULL DEFAULT '0',
highlight tinyint(1) NOT NULL DEFAULT '0',
digest tinyint(1) NOT NULL DEFAULT '0',
rate tinyint(1) NOT NULL DEFAULT '0',
special tinyint(1) NOT NULL DEFAULT '0',
attachment tinyint(1) NOT NULL DEFAULT '0',
moderated tinyint(1) NOT NULL DEFAULT '0',
closed mediumint(8) unsigned NOT NULL DEFAULT '0',
stickreply tinyint(1) unsigned NOT NULL DEFAULT '0',
recommends smallint(6) NOT NULL DEFAULT '0',
recommend_add smallint(6) NOT NULL DEFAULT '0',
recommend_sub smallint(6) NOT NULL DEFAULT '0',
heats int(10) unsigned NOT NULL DEFAULT '0',
`status` smallint(6) unsigned NOT NULL DEFAULT '0',
isgroup tinyint(1) NOT NULL DEFAULT '0',
favtimes mediumint(8) NOT NULL DEFAULT '0',
sharetimes mediumint(8) NOT NULL DEFAULT '0',
stamp tinyint(3) NOT NULL DEFAULT '-1',
icon tinyint(3) NOT NULL DEFAULT '-1',
pushedaid mediumint(8) NOT NULL DEFAULT '0',
cover smallint(6) NOT NULL DEFAULT '0',
replycredit smallint(6) NOT NULL DEFAULT '0',
relatebytag char(255) NOT NULL DEFAULT '0',
maxposition int(8) unsigned NOT NULL DEFAULT '0',
bgcolor char(8) NOT NULL DEFAULT '',
comments int(10) unsigned NOT NULL DEFAULT '0',
hidden smallint(6) unsigned NOT NULL DEFAULT '0',
PRIMARY KEY (tid),
KEY digest (digest),
KEY sortid (sortid),
KEY displayorder (fid,displayorder,lastpost),
KEY typeid (fid,typeid,displayorder,lastpost),
KEY recommends (recommends),
KEY heats (heats),
KEY authorid (authorid),
KEY isgroup (isgroup,lastpost),
KEY special (special)
) TYPE=MyISAM;
