Database Query Error - You've Probably Found a Bug

Database query failed (1267)

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Query SELECT COUNT(*) AS rowcount FROM biblio LEFT JOIN biblio_copy ON biblio.bibid=biblio_copy.bibid LEFT JOIN biblio_field ON biblio_field.bibid=biblio.bibid AND biblio_field.tag='100' WHERE author='Tijoux, Mar��a Emilia' failed. The DBMS said this:

Illegal mix of collations (latin1_swedish_ci,IMPLICIT) and (utf8_general_ci,COERCIBLE) for operation '='

Debug Backtrace (most recent call first):

/home/museo/public_html/openbiblio/classes/Error.php:140 FatalHandler->printBackTrace()
/home/museo/public_html/openbiblio/classes/Error.php:108 FatalHandler->dbError('SELECT COUNT(*) AS rowcount FROM biblio LEFT JOIN biblio_copy ON biblio.bibid=biblio_copy.bibid LEFT JOIN biblio_field ON biblio_field.bibid=biblio.bibid 
    AND biblio_field.tag=\'100\' WHERE author=\'Tijoux, Mar��a Emilia\' ', 'Database query failed (1267)', 'Illegal mix of collations (latin1_swedish_ci,IMPLICIT) and (utf8_general_ci,COERCIBLE) for operation \'=\'')
/home/museo/public_html/openbiblio/classes/Query.php:97 Fatal->dbError('SELECT COUNT(*) AS rowcount FROM biblio LEFT JOIN biblio_copy ON biblio.bibid=biblio_copy.bibid LEFT JOIN biblio_field ON biblio_field.bibid=biblio.bibid 
    AND biblio_field.tag=\'100\' WHERE author=\'Tijoux, Mar��a Emilia\' ', 'Database query failed (1267)', 'Illegal mix of collations (latin1_swedish_ci,IMPLICIT) and (utf8_general_ci,COERCIBLE) for operation \'=\'')
/home/museo/public_html/openbiblio/classes/Query.php:292 Query->_act('SELECT COUNT(*) AS rowcount FROM biblio LEFT JOIN biblio_copy ON biblio.bibid=biblio_copy.bibid LEFT JOIN biblio_field ON biblio_field.bibid=biblio.bibid 
    AND biblio_field.tag=\'100\' WHERE author=\'Tijoux, Mar��a Emilia\' ')
/home/museo/public_html/openbiblio/classes/BiblioSearchQuery.php:338 Query->_query('SELECT COUNT(*) AS rowcount FROM biblio LEFT JOIN biblio_copy ON biblio.bibid=biblio_copy.bibid LEFT JOIN biblio_field ON biblio_field.bibid=biblio.bibid 
    AND biblio_field.tag=\'100\' WHERE author=\'Tijoux, Mar��a Emilia\' ', 'Error al contar los resultados de búsqueda bibliográfica.')
/home/museo/public_html/openbiblio/shared/biblio_search.php:179 BiblioSearchQuery->searchTag('100a', 'Tijoux, Mar��a Emilia', 1, true)