Database error in vBulletin 4.0.8

Database error in vBulletin 4.0.8:
Invalid SQL:
(SELECT 'package' AS classtype, package.packageid AS typeid, package.packageid AS packageid,
package.productid AS productid, if(package.productid = 'vbulletin', 1, product.active) AS enabled,
package.class AS class, -1 as isaggregator
FROM package AS package
LEFT JOIN product AS product
ON product.productid = package.productid
WHERE product.active = 1
OR package.productid = 'vbulletin'
)
UNION
(SELECT 'contenttype' AS classtype, contenttypeid AS typeid, contenttype.packageid AS packageid,
1, 1, contenttype.class AS class , contenttype.isaggregator
FROM contenttype AS contenttype
INNER JOIN package AS package ON package.packageid = contenttype.packageid
LEFT JOIN product AS product ON product.productid = package.productid
WHERE product.active = 1
OR package.productid = 'vbulletin' );
MySQL Error : Illegal mix of collations (latin1_swedish_ci,IMPLICIT) and (latin1_general_ci,IMPLICIT) for operation '='
Error Number : 1267
Request Date : Sunday, November 14th 2010 @ 08:40:48 PM
Error Date : Sunday, November 14th 2010 @ 08:40:49 PM
Script : http://www.wns77.com/vb/admin/misc.php?do=updatethread
Referrer : http://www.wns77.com/vb/admin/misc.php?do=chooser
IP Address :
Username : Classname : vB_Database
MySQL Version : 5.0.91-community-log

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