Upgrading to 3beta2 renders DS-Error

[animaux]

Not sure if this belongs here. I get the following Error after upgrading:

<zeitspruenge>
  <error>MySQL-Fehler (1271): Illegal mix of collations for operation 'UNION' in Abfrage: (SELECT t1.`subsection_id`, t1.field_id
        FROM `sym_fields_subsectionmanager` AS t1
        INNER JOIN `sym_fields` AS t2
        WHERE t2.`element_name` = 'senf'
         AND t2.`parent_section` = '1' 
        AND t1.`field_id` = t2.`id`
        LIMIT 1)
      UNION
      (SELECT t1.`subsection_id`, t1.field_id
        FROM `sym_fields_subsectiontabs` AS t1
        INNER JOIN `sym_fields` AS t2
        WHERE t2.`element_name` = 'senf'
         AND t2.`parent_section` = '1' 
        AND t1.`field_id` = t2.`id`
        LIMIT 1)
      LIMIT 1</error>
</zeitspruenge>

[animaux]

Could be a problem with the not-yet-2.3-compatible bi-link-field, I guess …