Bug in Hikashop 1.6 in breadcrumb.php

Please try to change the line:
$query = 'SELECT DISTINCT b.* FROM '.hikashop_table(end($this->tables)).' AS a LEFT JOIN '.
hikashop_table(end($this->tables)).' AS b ON a.category_left >= b.category_left WHERE '.
'b.category_right >= a.category_right '.$and.$where.' ORDER BY b.category_left';

to:
$query = 'SELECT b.* FROM '.hikashop_table(end($this->tables)).' AS a LEFT JOIN '.
hikashop_table(end($this->tables)).' AS b ON a.category_left >= b.category_left WHERE '.
'b.category_right >= a.category_right '.$and.$where.' GROUP BY b.category_id ORDER BY b.category_left';

in the file administrator/components/com_hikashop/classes/category.php and that should solve the problem.