Filter editor resolves to LIKE BINARY

[Sytematic]

Hello,

using SmartGWT: SmartClient Version: v8.3p_2013-01-09/PowerEdition Deployment (built 2013-01-09)

One of the filter editors in one of my grids in my app (it's a dropdown listgrid in a SelectItem), generates the following criteria

=== 2013-02-12 09:48:10,254 [or19] DEBUG RPCManager - Request #1 (DSRequest) payload: {
    criteria:{
        surname:"Mee"
    },
    operationConfig:{
        dataSource:"Exam_participants_Student",
        operationType:"fetch",
        textMatchStyle:"substring"
    },
    startRow:0,
    endRow:75,
    sortBy:[
        "surname"
    ],
    componentId:"isc_PickListMenu_5",
    appID:"builtinApplication",
    operation:"customField",
    oldValues:{
        surname:"Mee"
    }
}

and then is transformed, eventually, into

 SELECT COUNT(*) FROM
              Exam_participants_Student
                      INNER JOIN Student ON Exam_participants_Student.Student_id = Student.Student_id
                      INNER JOIN Exam ON Exam_participants_Student.Exam_id = Exam.Exam_id
                      INNER JOIN Block                                      ON Exam.Block_id = Block.Block_id
                      LEFT OUTER JOIN ExamStructure ON ExamStructure.ExamStructure_id = Block.ExamStructure_id
                      LEFT OUTER JOIN users ON Student.Student_id = users.Student_id
       WHERE ('1'='1' AND ((Student.surname LIKE BINARY '%Mee%' AND Student.surname IS NOT NULL)))

The LIKE BINARY makes it case-sensitive, from what I understand. Why is this BINARY being added, and how can I prevent this?

Other grids in my app just make it

 LIKE '%Mee%'

Which is what I would like to happen.
How can I achieve this?

[Isomorphic]

Can you show the datasource? And the grid source if possible