In the current version 1.2.5.7b, it is not possible to update the category name, specially with lowercase uppercase.
I propose a solution, around line 1710 in admin/easypopulate.php.
Just after $thiscategoryid = $row['catID'];
add these lines :
// BOF Update category name
$sql = "UPDATE ".TABLE_CATEGORIES_DESCRIPTION." SET
language_id = '$epdlanguage_id',
categories_name = '".zen_db_input($thiscategoryname)."'
WHERE ( `categories_id` = '". $thiscategoryid . "' )" ;
$result = ep_query($sql);
// EOF Update category name
It's OK for me !
Try and say...
Bertrand