Participant notes incomplete when exporting participants

When exporting participants from a participant search, if some participant have a long participant_note, this note only shows the 64th first characters.

I've been researching a bit and I can see that in the function call writeCSVFromTable() at /CRM/Export/Bao/Export.php in the loop

foreach ($sqlColumns as $column => $dontCare)

{ $row[$column] = $dao->$column; }

when $column is 'participant_note' this value in the $dao object is already cut.

Not sure if this could be affecting other functionalities of CiviCRM.

I reproduced this issue at http://drupal.demo.civicrm.org/ with the following steps:
(1) register a participant in a event
(2) Search > Find participants
(3) Select registered participant and click on Export participants
(4) Then in the CSV file the Participant Note column is incomplete