Проблема после обновления vBulletin

Обновил сегодня булку до vBulletin 3.8.3

Теперь не создаються новые темы.

А так всё работает.

Вот ошибка

Database error in vBulletin 3.8.3:



Invalid SQL:



			SELECT prefix.*, prefixpermission.usergroupid AS restriction

			FROM forumprefixset AS forumprefixset

			INNER JOIN prefixset AS prefixset ON (prefixset.prefixsetid = forumprefixset.prefixsetid)

			INNER JOIN prefix AS prefix ON (prefix.prefixsetid = prefixset.prefixsetid)

			LEFT JOIN prefixpermission AS prefixpermission ON (prefix.prefixid = prefixpermission.prefixid)

			WHERE forumprefixset.forumid = 21

			ORDER BY prefixset.displayorder, prefix.displayorder;



MySQL Error   : Illegal mix of collations (latin1_swedish_ci,IMPLICIT) and (cp1251_general_ci,IMPLICIT) for operation '='

Error Number  : 1267

Request Date  : Monday, June 15th 2009 @ 10:53:19 PM

Error Date    : Monday, June 15th 2009 @ 10:53:19 PM

Script        : http://forum-seo.net/newthread.php?do=newthread&f=21

Referrer      : http://forum-seo.net/forumdisplay.php?f=21

IP Address    : 62.221.88.192

Username      : Seo-man

Classname     : vB_Database

MySQL Version : 5.0.51a-community

Сам форум http://forum-seo.net/

как решить проблему?