Hi,
the only solution I can see at the moment would be a modification in a Visforms Core file.
I think that if you make the following modifications to the file administrator\components\com_visforms\helpers\html\visforms.php this would work but I have not tested (Please make a backup copy of the original file first in case the modification does not work.) and you will loose these changes with any Visforms update (and have to add them manually after the update again.)
In the public static function replacePlaceholder($form, &$text = '') you find the following code at about line 729
Code:
if (in_array($fieldtype, array("multicheckbox", "select", "radio")))
{
$fieldValue = implode(', ', JHtmlVisformsselect::mapDbValueToOptionLabel($fieldValue, $ffield->list_hidden));
}
replace it with
Code:
if (in_array($fieldtype, array("multicheckbox", "select", "radio")))
{
$fieldValue = JHtmlVisformsselect::removeNullbyte($ffield->dbValue);
}
Regards,
Aicha