在 register.php 中查找
require_once DISCUZ_ROOT."./include/cache.func.php"; $_DCACHE["settings"]["totalmembers"]++; updatesettings();
替换为：
require_once DISCUZ_ROOT."./include/cache.func.php"; $_DCACHE["settings"]["totalmembers"]++; $_DCACHE["settings"]["lastmember"] = $discuz_userss; updatesettings();