Excellent change! For consistency, I changed that same line to:
[qcode] array_push( $catlist_ary, get_category_path( $image_row['cat_id'], 1 ).$config['category_separator'].htmlspecialchars(stripslashes($org_search_keywords))); // Result category[/qcode]
I've updated the original post so that no one has to change the « manually -- it'll defer to the regular cat separator.
Thanks!