It seems that I've got exactly the same problem:
?866 ?1132795260?(/home/users/plastikowe/public_html/forum/index.php:76<br />
/home/users/plastikowe/public_html/forum/index.php:176<br />
/home/users/plastikowe/public_html/forum/theme/default/login.php:554<br />
/home/users/plastikowe/public_html/forum/index.php:1181<br />
) 1267: Illegal mix of collations (latin1_swedish_ci,IMPLICIT) and (latin2_general_ci,COERCIBLE) for operation '='<br />
Query: SELECT id, passwd, login, email, users_opt, ban_expiry FROM fud26_users WHERE login='Piotr Mikołajski'<br />
_GET: array (
't' => 'login',
)<br />
_POST: array (
'SQ' => '0',
'adm' => '1',
)<br />
Server Version: 4.1.12-standard-log
Am I right? And what exactly should I do? I'm pretty far for being MySQL power user and "Check the collation settings of individual tables" unfortunately means nothing to me